The equation simplifies to 14 = 14, which is a true statement.
What is the purpose of the equation?In mathematics, an equation is defined as a set of numbers that contains operations and may contain a variable. Equations are used to solve for these unknown variables using various operations such as addition, subtraction, multiplication and division.
Replacing m by 4, we get:
m + 2 (m + 1) = 14
4 + 2 (4 + 1) = 14
4 + 2(5) = 14
4 + 10 = 14
14 = 14
The equation simplifies to 14 = 14, which is a true statement. Therefore, the given value 4 is a solution to Eq.
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Find the circumference of the circle. Round to the nearest tenth.
A. 148.4 m
B. 169.6 m
C. 84.8 m
D. 54.0 m
Answer:
C. 84.8 m
Step-by-step explanation:
Circumference of circle = D x 3.14
D = 27 m
Let's solve
27 x 3.14 = 84.78 m
So, the circumference of the circle is C. 84.8 m
Answer:
Option C) 84.8 is the correct answer.
Step-by-step explanation:
Here we have given that the diameter of circle is 27 m and we have to find the circumference of circle. The formula to find circumference of circle is :
[tex]\dashrightarrow\sf{C = \pi d}[/tex]
Where :
C = circumference π = 3.14 d = diameterThus, finding the circumference of circle by substituting the given values in the formula :
[tex]\dashrightarrow\sf{C = \pi d}[/tex]
[tex]\dashrightarrow\sf{C = \pi \times d}[/tex]
[tex]\dashrightarrow\sf{C = 3.14 \times 27}[/tex]
[tex]\dashrightarrow\sf{C = 84.78 \: m}[/tex]
[tex]\dashrightarrow\sf{C \approx 84.8\: m}[/tex]
Hence, the circumference of circle is 84.8 m.
—————————————————Need help don’t know how to do failed 3 times cause of it help
The expression that can be used to find out the amount of time it would take Sal to finish the remaining homework is C. 4 / 9 x 3 / 5 .
How to find the expression ?To find the expression that would show the time it would take for Sal to finish his homework, the formula would be:
= Proportion of questions remaining x Time taken to finish one question
Proportion of questions remaining:
= 1 - 5 / 9
= 4 / 9
Time taken to finish one question:
= 3 / 5 minutes
The expression is therefore:
4 / 9 x 3 / 5
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Find the perimeter and area of each
How to solve this problem?
Answer:
Step-by-step explanation:
Perimeter: 34 yd
Area: 37 yd²
MODELING REAL LIFE
The height of a tree trunk is 20 meters and the base diameter is 0.5 meter.
a. The wood has a density of 380 kilograms per cubic meter. Find the mass of the trunk.
The mass of the tree trunk is about
kilograms.
Question 2
b. For each of the next 5 years, the trunk puts on a growth ring 4 millimeters thick. In the first year, the height increases by 0.2 meter. The tree produces the same amount of wood each year. What is the height of the trunk after 5 years?
The height of the trunk is about
meters after 5 years.
Answer:
a. 1492 kg
b. 20.8 m
Step-by-step explanation:
Given a tree is initially 20 m high and has a diameter of 0.5 m, you want the mass of the trunk if its density is 380 kg/m³. If it adds a growth ring of 4 mm per year and adds height of 0.2 m in the first year, you want the height of the tree after 5 years, assuming the same amount of wood is added each year.
a. MassThe volume of the tree trunk is that of a cylinder. The formula is ...
V = (π/4)d²h
V = (π/4)(0.5 m)²(20 m) ≈ 3.9270 m³
The mass is the product of volume and density:
M = Vρ
M = (3.9270 m³)(380 kg/m³) ≈ 1492 kg
The mass of the tree trunk is about 1492 kg.
b. HeightIn the first year, the diameter of the tree increases by 8 mm, and the height increases by 0.2 m,. This means the volume of the tree increases to ...
V = (π/4)(0.508 m)²(20.2 m) ≈ 4.0942 m³
The volume increase is the same each year for 5 years, so after 5 years, the volume is ...
3.9270 m³ + 5(4.0942 -3.9270) m³ ≈ 4.7630 m³
At that time, the diameter is about 0.540 m. Solving the volume equation for the height, we find it to be ...
h = 4v/(π·d²)
h = 4(4.7630 m³)/(π·(0.54 m)²) ≈ 20.797 m
The height of the trunk after 5 years is about 20.8 m.
__
Additional comment
We note that the wood added in the first year includes the cylindrical shell represented by the tree ring, and a cylindrical "plug" that is 0.2 m high and equivalent in diameter to the rest of the tree. This seems an odd way for the tree to grow, but may be a reasonable approximation to the actual growth.
The height, diameter, and growth are all given to 1 significant figure. Hence the 4- and 3-significant figures used in the answers may be unsupported by the precision of the given numbers. Keeping 2 significant figures, we might report the initial mass as 1500 kg, and the final height as 21 m.
The graph is drawn by a function formulated to have the correct height at the x-intercept: v(d, h) - (final volume) = 0.
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Solve the systems of equations shown below.
2x- 6y = -12
X + 2y = 14
Calculate the area of the shaded region
4 ft 2 ft
8 ft
3 1/2 ft
5 ft.
Answer:
please let me know what is the name of the shape. Thank you
Find the perimeter and the area of the figure. Round answers to the nearest tenth.
Composite shape formed by a rectangle and two semicircles. Each semicircle has a diameter of 15 feet and is aligned with the length of the rectangle. The rectangle has a width of 4 feet.
perimeter: about
ft
area: about
ft²
The answer of the given question based on the circle and rectangle is , the perimeter of the shape is approximately 83.8 feet, and its area is approximately 148.4 feet².
What is Perimeter?Perimeter is a measurement of the distance around the edge of a two-dimensional shape. It is the sum of the lengths of all the sides of the shape. The perimeter is often measured in units of length, such as centimeters, meters, or feet.
To find the perimeter and area of the composite shape formed by a rectangle and two semicircles, we can break it down into its individual components and then add them up.
First, let's find the perimeter. The shape consists of two semicircles, each with a diameter of 15 feet, and a rectangle with a width of 4 feet and a length equal to the diameter of the semicircles, which is 15 feet. The perimeter can be calculated as:
Perimeter = 2 × (semicircle circumference) + rectangle perimeter
The circumference of circle is by the formula 2πr, where r is the radius. Since each semicircle has a diameter of 15 feet, its radius is 7.5 feet. Therefore, the circumference of each semicircle is:
C = 2πr = 2π(7.5) = 15π feet
The perimeter of the rectangle is simply the sum of its four sides, which is:
P = 2(length + width) = 2(15 + 4) = 38 feet
Putting it all together, we have:
Perimeter = 2 × 15π + 38 ≈ 83.8 feet
Now let's find the area. The shape consists of two semicircles, each with a diameter of 15 feet, and a rectangle with a width of 4 feet and a length equal to the diameter of the semicircles, which is 15 feet. The area can be calculated as:
Area = (semicircle area) + rectangle area
The area of a circle is given by the formula πr². Since each semicircle has a diameter of 15 feet, its radius is 7.5 feet. Therefore, the area of each semicircle is:
A = (1/2)πr² = (1/2)π(7.5)² = 44.18 feet²
The area of the rectangle is simply its length multiplied by its width, which is:
A = length × width = 15 × 4 = 60 feet²
Putting it all together, we have:
Area = 2 × 44.18 + 60 = 148.4feet²
Therefore, the perimeter of the shape is approximately 83.8 feet, and its area is approximately 148.4 feet².
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A. Find the distance between the following pairs of points.(1,5),(3,8)
according to the question the distance between the points (1, 5) and (3, 8) is √13 units.
What is distance ?Distance is an object's total, aimless movement. Without regard to whether an object represents a starting or finishing point, distance can be defined as the total distance travelled. Distance is referred to as the breadth or height of the difference between two locations. It should be highlighted that the distance between each of the vantage points as well as the distance travelled from one to the other are not the same thing. The total length of a path connecting two locations counts as the distance travelled. Distance is the real distance that a body travels. It also goes by the name "path length." For instance, the length of the route for an object moving from point O to point P would be OP = 360 m.
given,
To find the distance between the points (1, 5) and (3, 8), we can use the distance formula:
distance = √[(x2 - x1)² + (y2 - y1)²]
Substituting the given values, we get:
distance = √[(3 - 1)² + (8 - 5)²]
distance = √[4 + 9]
distance = √13
Therefore, the distance between the points (1, 5) and (3, 8) is √13 units.
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what is the value of x if a shape has sides messuring 131, 122, 125, 148, 107, 126
The value of x unknown for the given shape with given measurements 131°, 122°, 125°, 148°, 107°, 126° is equal to 141°.
The attached figure is seven sided polygon.
Seven sided polygon is called Heptagon.
Sum of all the interior angles of seven sided polygon = 900 degrees
Measurements are,
131°, 122°, 125°, 148°, 107°, 126°
Measurement of seventh angle is unknown.
let the measure of seventh angle be x°
⇒ x° + 131° + 122° + 125° + 148° + 107° + 126° = 900°
⇒ x° + 759° = 900°
⇒ x° = 900° - 759°
⇒ x° = 141°
Therefore, the value of x for the given shape with measurements is equal to 141°.
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The above question is incomplete , the complete question is:
what is the value of x if a shape has sides measuring 131, 122, 125, 148, 107, 126.
Attached figure.
Match the equation or expression to the number of terms, the coefficients and the constants.
Equation: [tex]6xt^4yz^3 + 10a = 1[/tex]. Number of terms: 2, Coefficients: 6, 10 and Constants: 1.
Equation: [tex]25abc^2ab + 3ac6bc + 25[/tex], Number of terms: 3. Coefficients: 25, 3, 6. Constants: 25
What is equation and an expression?
A random combination of integers, variables, functions, etc. can be described as an expression. An expression is, for instance, 3x - 2. An equation, on the other hand, is created when two independent expressions are joined by the equal to sign. An equation, for instance, is when 3x - 2 = 5 + x.
Equation/Expression: 6xt⁴yz³ + 10a = 1
Number of terms: 2
Coefficients: 6, 10
Constants: 1
Equation/Expression: 25abc²ab + 3ac6bc + 25
Number of terms: 3
Coefficients: 25, 3, 6
Constants: 25
Equation/Expression: 25y³xy + 5 = 100
Number of terms: 2
Coefficients: 25, 1
Constants: 5, 100
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r=7/8cosθ+2sinθ
Which of the following gives the Cartesian form of the equation above?
Select the correct answer below:
x2+y2=7/10
y=−1/4x+7/8
y=−4x+7/2
8x2+2y2=7
Answer: 8x^2 + 2y^2 = 7
Step-by-step explanation:
The equation R = 7/8cosθ + 2sinθ can be rewritten in terms of x and y using the conversions x = Rcosθ and y = Rsinθ.
Substituting R = 7/8cosθ + 2sinθ into these equations, we get:
x = (7/8)cosθ cosθ + 2sinθ cosθ
y = (7/8)cosθ sinθ + 2sinθ sinθ
Simplifying these expressions using trigonometric identities, we get:
x = (7/8)cos^2θ + (4/8)sin2θ
y = (7/8)sinθ cosθ + (4/8)sin2θ
Multiplying both sides of the x equation by 8/7 and simplifying, we obtain:
8x^2 + 2y^2 = 7cos^2θ + 8sin^2θ
Using the identity cos^2θ + sin^2θ = 1, we get:
8x^2 + 2y^2 = 7(1)
Therefore, the Cartesian form of the equation is 8x^2 + 2y^2 = 7.
Answer:y=−4x+7/2
Step-by-step explanation:
Multiply each side of the equation by 8cosθ+2sinθ to get 8rcosθ+2rsinθ=7. Using the relationships x=rcosθ and y=rsinθ, the equation becomes 8x+2y=7. Solving this equation for y shows that y=−4x+7/2.
Solve for x. I attached the image. Pls help :(
Based on the intersecting chords, the calculated value of x on the circle is 11
Calculating the value of x in the circleThe given shape in the question is a circle
As a general rule, a circle is a shape with all points on its boundary equidistant from a central point called the center
In this case, the center is point W
The sum of angles on the circumference is 360
So, we have
17x - 20 + 75 + 2 * 59 = 360
Evaluating the like terms, we have
17x = 187
Divide by 17
x = 11
Hence. the value of x is 11
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Find LM
A. 18
B. 24
C. 28
D. 36
Applying the Two-Tangent Theorem, the length of segment LM in the circle is: A. 18.
What is the Two-Tangent Theorem?
If two tangent segments are drawn to one circle from the same external point, the Two-Tangent Theorem states that both segments are congruent together.
Applying the theorem, we have:
4x - 2 = 3x + 3
Find the value of x:
4x - 3x = 2 + 3
x = 5
Find the length of LM:
LM = 3x + 3
Plug in the value of x:
LM = 3(5) + 3
LM = 18
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4. Which of the following angles is vertical to angle /DEB?
A
C
109°
E
D
B
The angle that is vertical to angle DEB is A.
What is a vertical angle?A vertical angle is an angle formed by two intersecting lines or planes that are perpendicular to each other. Specifically, it is the angle between two straight lines or planes that intersect each other and are perpendicular to the horizontal plane.
The measure of a vertical angle is always the same as the measure of the other vertical angle formed by the same two intersecting lines or planes. This is because vertical angles are always congruent, meaning they have the same size and shape. Vertical angles are commonly used in geometry and trigonometry to solve problems involving angles, lines, and plane.
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Aaron writes an algebraic expression to represent the product of 14 and the difference of 18 and 3x. what are the factors
Aaron's algebraic expression is:
14 * (18 - 3x)
What is algebraic expression?an algebraic expression is an expression built up from constant algebraic numbers, variables, and the addition, subtraction, multiplication, division and exponentiation by an exponent that is a rational number.
This expression represents the product of 14 and the difference of 18 and 3x. The factors of this expression are:
14: This is a constant factor that multiplies the difference of 18 and 3x.
(18 - 3x): This is the distinction of 18 and 3x, which is being duplicated by 14. It is a two-term binomial expression: 18 and -3x. The first term, which has a coefficient of -3, is a variable, while the second term, which has a coefficient of -3, is a constant.
To work on the articulation, we can utilize the distributive property of augmentation to get:
14 * (18 - 3x) = 14*18 - 14*3x = 252 - 42x
In this worked on structure, the elements are as yet 14 and (18 - 3x). However, additional factors of the simplified expression, such as 2 and 21, which are factors of 42 (the coefficient of x), can also be identified.
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Jared also wants to make fruit punch. He has 8 pints each of orange juice, pineapple juice, and cranberry juice. Which of the following is true? A. He does not have enough of each type of juice to make 1 recipe. B. He has enough of each type of juice to make 1 recipe. C. He has enough of each type of juice to make 2 recipes. D. He has enough of each type of juice to make 3 recipes.
We can see here that if Jared wants to make fruit punch and he has 8 pints each of orange juice, pineapple juice, and cranberry juice, we can deduce here that the following is true: B. He has enough of each type of juice to make 1 recipe.
What is a fruit punch?Fruit punch is a non-alcoholic drink that is created by combining different fruit juices. It is a well-liked beverage for parties and other social occasions and is normally served chilled.
Fruit punch's exact ingredients might vary, but typically it consists of a mixture of juices including orange, pineapple, cranberry, and/or grapefruit that have been combined with sugar, water, or carbonated water.
We can see here that in order to make 1 recipe of fruit punch, we need 2 pints of orange juice, 2 pints of pineapple juice, and 1 pint of cranberry juice.
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I need help asap pls!!!!
Using the functions, we can find the graphs for each function as follows:
Graph 3 is: g (x) = [tex]4^{x}[/tex]
Graph 4 is: h (x) = [tex]-4^{x}[/tex]
Graph 2 is: f (x) = [tex]-(\frac{1}{4})^{x}[/tex]
Graph 1 is: k (x) = [tex](\frac{1}{4})^{x}[/tex]
Define functions?A function is a procedure or a relation that links each element of a non-empty set A, at least one element of another non-empty set B, to another element of the first non-empty set A. In mathematics, a relation f between two sets, A and B, is referred to as the function's domain and co-domain. For all values of a and b, f = (a,b)|
Based on elements like the domain and range of a function, as well as the function expression, the function y = f(x) is categorised into many categories of functions. The domain x value is referred to as input for the functions. The domain value can be a fraction, decimal, angle, integer, or decimal. The range is also represented by the y value or the f(x) value.
Graph 3 is: g (x) = [tex]4^{x}[/tex]
Graph 4 is: h (x) = [tex]-4^{x}[/tex]
Graph 2 is: f (x) = [tex]-(\frac{1}{4})^{x}[/tex]
Graph 1 is: k (x) = [tex](\frac{1}{4})^{x}[/tex]
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how to find the area for a rectangle?
Answer:
Area of a rectangle = Length x Width
Step-by-step explanation:
Length = 25 cm
Width = 8 cm
25 x 8 = 200
So the area of a rectangle = 60 cm^2
Question 9: Use the function f(t) = -16t^2 + 60t + 16 to answer Part A, B, & C. Part B: identify the line of symmetry vertex of the parabola ( give exact decimal answers )
The line of symmetry of the parabola is t = 1.875 and the vertex of the parabola is (1.875, 77).
What is a function?A function is a mathematical concept that relates an input value (or values) to an output value (or values) according to a specific rule or set of rules. It can be thought of as a machine that takes in one or more inputs and produces a corresponding output. Functions are often represented using function notation, such as f(x) or g(t), where the variable in the parentheses (x or t) represents the input and the value of the function (f(x) or g(t)) represents the output.
According to the given information:To identify the line of symmetry and vertex of the parabola given by the function [tex]f(t) = -16t^2 + 60t + 16[/tex], we need to use the formula:
t = -b/2a
where "a" is the coefficient of the [tex]t^2[/tex] term (-16 in this case) and "b" is the coefficient of the t term (60 in this case).
Part A: Identify the line of symmetry of the parabola.
Using the formula above, we get:
t = -60 / 2(-16) = 1.875
So the line of symmetry of the parabola is t = 1.875.
Part B: Identify the vertex of the parabola.
To find the vertex, we need to substitute the value we found for t into the original function:
[tex]f(1.875) = -16(1.875)^2 + 60(1.875) + 16 = 77[/tex]
So the vertex of the parabola is (1.875, 77).
Therefore, the line of symmetry of the parabola is t = 1.875 and the vertex of the parabola is (1.875, 77).
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The relationship between tickets earned and points earned in a game is
described below.
• 1 ticket earned for every 9 points earned
• 2 tickets earned for every 18 points earned
• 3 tickets earned for every 27 points earned
If the pattern continues, how many tickets are earned when 54 points are earned?
Show your work.
The total number of 6 tickets will be earned when 54 points are earned.
Given that the total number of tickets earned for 9 points was earned = 1 ticket
the tickets earned when every 18 points are earned = 2 tickets
the tickets earned when every 27 points are earned = 3 tickets
Let's divide the points by tickets to find out how many points are earned for each ticket.
9/1 = 18/2 = 27/3 = 9
This shows for every ticket 9 points are earned. So, to find out the no. of tickets for 54 points, we can divide the 54 by 9.
no. of tickets earned for 54 points = 54/9 = 6 tickets.
From the above analysis, we can conclude that the 6 tickets are earned for 54 points.
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Given the function f(x) = x, what is the effect of f(x) - 8?
A. The new line is parallel to the original
B. The new line has a smaller rate of change
C. The x intercept decreases
C. The y intercept increases
If the function f(x) = x, the effect of f(x) - 8 is: is (D) The y intercept decreases.
What is the effect of f(x) - 8?The function f(x) = x is a linear function with a slope of 1, which means that for every increase of 1 in the x-value, the y-value also increases by 1.
If we subtract 8 from the function, we get:
f(x) - 8 = x - 8
This is still a linear function with a slope of 1, but it has been shifted downwards by 8 units.
Therefore, the effect of f(x) - 8 is that the y-intercept decreases by 8 (since the y-intercept of f(x) is 0 and the y-intercept of f(x) - 8 is -8), while the slope remains the same.
So the correct answer is (D) The y intercept decreases.
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baseball team 747 for the season this was 9 times the number the number
Hence ,the basketball team scored 83 points in the first game.
What is the basketball?Basketball is a team sport in which two teams, most commonly of five players each, opposing one another on a rectangular court, compete with the primary objective of shooting a basketball through the defender's hoop, while preventing the opposing team from shooting through their own hoop.
What is the team ?A team is a group of individuals (human or non-human) working together to achieve their goal.As defined by Professor Leigh Thompson of the Kellogg School of Management, team is a group of people who are interdependent with respect to information, resources, knowledge and skills and who seek to combine their efforts to achieve a common goal
Let x be the number of points scored in the first game.
According to the question,
747 = 9 x
now 9 divided by both sides,
x = [tex]\frac{747}{9}[/tex]
than we get:
x = 83
Therefore, the basketball team scored 83 points in the first game.
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Complete question is:
A basketball scored 747 points for the season.This was 9 times the number of points they scored in the first game.How many points were scored in the first game.
The volume is 720cm3 the area bass is 36cm2 what is the height
We can use the formula for the volume of a cylinder: V = Ah, where A is the base area and h is the height.
Substituting the given values, we have:
720 cm³ = 36 cm² x h
Simplifying, we can divide both sides by 36 cm²:
20 cm = h
Therefore, the height is 20 cm.
Find the interquartile range of the given data set.
8.4, 7.1, 6.3, 6.8, 9.2, 7.3, 8.8, 7.9, 5.3, 8.2
Thus, the interquartile range of the given data set. are -
1st quartile (Q1) = 6.8 ; 2nd quartile (Q2) = 7.6 and 3rd quartile (Q3) = 8.4 .interquartile range = 1.60.
Explain about the interquartile range:The interquartile range in descriptive statistics reveals the spread of your distribution's middle half.
Each distribution that is sorted from low to high is divided into four equal portions using quartiles. The third and second quartiles, or the centre half of your data set, are contained in the interquartile range (IQR).
The interquartile range provides the range of a middle half of a data set, whereas the range provides the spread of the entire data set.
Given data set:
8.4, 7.1, 6.3, 6.8, 9.2, 7.3, 8.8, 7.9, 5.3, 8.2
arrange the data set in ascending order:
5.3, 6.3, 6.8, 7.1, 7.3, 7.9, 8.2, 8.4, 8.8, 9.2
Total term = 10 (even)
2nd quartile (Q2) 50% quartile - (5th + 6th) /2 = (7.3 + 7.9) /2 = 7.6
Now:
1st quartile (Q1) 25% quartile - 3rd term = 6.8
3rd quartile (Q3) 75% - 8th term = 8.4
Thus, the interquartile range of the given data set. are -
1st quartile (Q1) = 6.8 ; 2nd quartile (Q2) = 7.6 and 3rd quartile (Q3) = 8.4 .
interquartile range = maximum - minimum
interquartile range = 8.4 - 6.8 = 1.60.
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1. A group of armed forces personnel were surveyed. The branch of
service was recorded in the chart below.
27%
12%
Branch of Service
Army
Navy
What percent of the whole group are in the Navy?
A
26%
Marine Corps
Air Force
Coast Guard
Number of Members
165
135
60
130
10
The percent of the whole group are in the Navy is 27%.
How to calculate the percentagePercent is a term used to express a fraction or a ratio out of 100. It is represented by the symbol "%". For example, if there are 20 red balls out of a total of 100 balls, we can say that the percentage of red balls is 20%.
To calculate the percentage, we can use the following formula:
Percentage = (Part / Whole) x 100
where "Part" is the value we want to express as a percentage, and "Whole" is the total value.
The percent of the whole group are in the Navy is:
= 135/500 × 100
= 27%.
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Answer:
27%
Step-by-step explanation:
135 of the 500 total members are in the Navy. Meaning that 135 out of 500 is 27%
FCATOR EACH POLYNOMIAL. LOOK FOR A GCF FIRST.
3x²-3y²
Answer:
3 (x + y) (x - y)
Step-by-step explanation:
3x²-3y²
GCF is 3
3(x² - y²)
Since both terms are perfect squares, factor using the difference of squares formula, a² − b² = (a+b) (a−b) where a = x and b = y.
So, the answer is 3 (x + y) (x - y)
PLS HELP I WILL RATE!!
Consider the graph of the function f(x)= 1n x Which is a feature of function g if g(x)=-f(x-4)
A feature of function gif g(x) = f(x-4) is D. horizontal asymptote of y = 4
What is the asymptote aboutA horizontal asymptote is a straight line on a graph that a function approaches but never touches as the independent variable (usually denoted as x) increases or decreases without bound. In other words, the function gets closer and closer to the horizontal line as x becomes very large or very small, but it never actually touches or crosses it.
A function can have at most two horizontal asymptotes - one on the left side of the graph and one on the right side. The horizontal asymptotes of a function are determined by the highest degree of the polynomial in the numerator and the denominator of the function.
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A company that manufactures batteries used in electric cars is reporting that their newest model of battery has a mean
lifetime, μ, of 12 years. To test the company's claim, a competitor has selected 35 of these batteries at random. The mean
lifetime of the sample is 12.5 years. Suppose the population standard deviation of these lifetimes is known to be 3.5 years.
Is there enough evidence to reject the claim that the mean lifetime of the newest model is 12 years? Perform a hypothesis
test, using the 0.10 level of significance.
The conclusion of the given hypothesis is: we FAIL to reject the null hypothesis and conclude that there is not enough evidence to reject the claim that the mean lifetime of the newest model is 12 years
How to carry out Hypothesis Testing?The parameters given are:
Population mean: μ = 12
Sample mean: x' = 12.5
Population standard deviation; σ = 3.5
Sample size: n = 35
Let's define the hypotheses:
Null Hypothesis: H₀: μ = 12
Alternative Hypothesis: Hₐ: μ ≠ 12
Let us find the z-score from the formula:
z = (x' - μ)/(σ/√n)
z = (12.5 - 12)/(3.5/√35)
z = 0.845
The p-value from online p-value from z-score calculator using two tailed hypothesis and a significance level of 0.1 gives:
p-value = 0.398
The p-value is greater than the significance value and we FAIL to reject the null hypothesis and conclude that there is not enough evidence to reject the claim that the mean lifetime of the newest model is 12 years
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Note: Enter your answer and show all the steps that you use to solve this problem in the space provided.
Using the following set of data, calculate the lower quartile, the upper quartile, and the interquartile range.
20, 22, 25, 28, 29, 30, 32, 33, 34
Be sure to show your work for finding:
the lower quartile
the upper quartile
the interquartile range
Answer:
To find the lower and upper quartiles and the interquartile range, we first need to order the data from smallest to largest:
20, 22, 25, 28, 29, 30, 32, 33, 34
Next, we find the median (middle value) of the entire dataset:
Median = (29 + 30) / 2 = 29.5
This median value divides the data into two halves. We then find the median of the lower half of the data, which includes all values less than or equal to 29.5:
Lower half: 20, 22, 25, 28, 29
Median of lower half = (25 + 28) / 2 = 26.5
This value, 26.5, is the lower quartile (Q1).
Similarly, we find the median of the upper half of the data, which includes all values greater than or equal to 29.5:
Upper half: 30, 32, 33, 34
Median of upper half = (32 + 33) / 2 = 32.5
This value, 32.5, is the upper quartile (Q3).
Finally, we can calculate the interquartile range (IQR) as the difference between the upper and lower quartiles:
IQR = Q3 - Q1 = 32.5 - 26.5 = 6
Therefore, the lower quartile is 26.5, the upper quartile is 32.5, and the interquartile range is 6.
Help please!!!!!!
!!!!!
Answer: GL = [tex]\sqrt{61}[/tex]
Step-by-step explanation:
Since this is a right triangle, we can use the Pythagorean theorem. GL is the hypotenuse.
Given:
a² + b² = c²
Substitue:
AL² + AG = GL²
Find side lengths (count via the coordinate plane given):
6² + 5² = GL²
Square:
36 + 25 = GL²
Add:
61 = GL²
Square root both sides:
[tex]\sqrt{61}[/tex] = GL