The description describes the solutions to this inequality in all the positive numbers that are greater than ten. The correct option is B.
What is inequality?Relationships between two expressions that aren't equal to one another are known as inequalities. Social justice theories are fundamentally based on the idea of inequality, which is the condition of not being equal, especially in terms of status, rights, and opportunities.
The given equation is 9 > 52.
everything that is positive and bigger than 10
Therefore, the correct option is B. All the positive numbers are greater than ten.
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Two runners run in different directions, 60° apart. Alex runs at 5m/s, Barry runs at 4m/s. Barry passes through X 3 seconds after Alex passes through X. At what rate is the distance between them increasing at the instant when Alex is 20 metres past X?
Answer:
Draw a picture of Angkor Wat
A rectangle has a perimeter of 36 feet. It is twice as long as it is wide. What are the dimensions of the rectangle??
Dimensions of the rectangle are 6 feet and 12 feet.
What is a Rectangle?Rectangle is a quadrilateral whose each pair of opposite sides are equal in length and each two consecutive sides are in right angle to each other. In rectangle one pair of equal opposite sides is called Length and another one is called Width.
What is the formula of Perimeter of a Rectangle?If length of a rectangle is L and width of rectangle is W then the perimeter of that rectangle will be = 2(L+W)
Let W be the rectangle's width.
Here according to question the rectangle is twice as long as it is wide.
So, length of rectangle = 2W
Perimeter will be = 2(W+2W) = 2*(3W) = 6W
So, according to question,
6W = 36
W = 36/6 = 6
Thus the width of the rectangle is = 6 feet.
Then the length = 2*6 = 12 feet.
Hence dimensions of the rectangle are 12 feet and 6 feet respectively.
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i need help with all 4 thanks
Answer: 5,8,6,1
Step-by-step explanation:
math
Given the piecewise function below, evaluate the function as indicated
The evaluation of the functions using piecewise function gives:
f(-9) = 8
f(0) = 2
f(6) = 7
f(-6) = 4
f(3) = 4.5
f(9) = -6
How to evaluate the functions using piecewise function?
To evaluate the functions using piecewise function, we have to the condition they satisfy. That is:
For f(-9), x = -9. Thus, x≤ -6. So use f(x) = (-4/3)x - 4 to evaluate f(-9). That is:
f(-9) = (-4/3)*(-9) - 4
f(-9) = 8
For f(0), x = 0. Thus, -6 x ≤ 6. So use f(x) = (5/6)x + 2 to evaluate f(0). That is:
f(0) = (5/6)*0 + 2
f(0) = 2
For f(6), x = 6. Thus, -6 x ≤ 6. So use f(x) = (5/6)x + 2 to evaluate f(6). That is:
f(6) = (5/6)*6 + 2
f(6) = 7
For f(-6), f(x) = (-4/3)x - 4:
f(-6) = (-4/3)*(-6) - 4
f(-6) = 4
For f(3), f(x) = (5/6)x + 2:
f(3) = (5/6)*3 + 2
f(3) = 4.5
For f(9), x = 9. Thus, x > 6. Use f(x) = -2x + 12:
f(9) = -2*9 + 12
f(9) = -6
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Please explain how to do this (Find the trig ratio) i have no idea :(
The cosine of angle B is: cos(B) = AC / AB = 20/29
Define the Pythagorean Theorem?
The Pythagorean Theorem, a well-known geometric theorem that states that the sum of the squares of the legs of a right-angled triangle is equal to the square of the hypotenuse (the opposite side of the right angle) - that is, in familiar algebraic notation. , a2 + b2 = c2 .
In a right triangle, the cosine of an angle is defined as the ratio of the adjacent side to its hypotenuse. In this case, angle B is the angle we are interested in, and the adjacent side is side AC. Using the Pythagorean theorem, we find the length of side AC:
AC² = AB²+ BC²
AC² = 29² - 21²
AC² = 400
AC = 20
Therefore, the cosine of angle B is:
cos(B) = AC / AB = 20/29
Other trigonometric ratios of angle B can be found using the following formulas:
sin(B) = BC / AB = 21/29
tan(B) = BC / AC = 21/20
csc(B) = AB / BC = 29 / 21
sec(B) = AB / AC = 29/20
bed (B) = AC / BC = 20 / 21
Thus, the trigonometric ratios of angle B are:
sin(B) = 21/29
cos(B) = 20/29
tan(B) = 21/20
csc(B) = 29/21
sec(B) = 29/20
crib(B) = 20/21
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Finding the Mean and Median 42,5,25,2,35
The mean of the given set of numbers is 21.8. and median is 25.
Define meanIn mathematics and statistics, the mean is a measure of central tendency that represents the average value of a set of numbers. It is calculated by adding up all the numbers in the set and then dividing by the total number of values. The mean is also known as the arithmetic mean or average.
To find the mean and median of the given set of numbers, we can follow these steps:
Arrange the numbers in order from smallest to largest: 2, 5, 25, 35, 42.
To find the mean, add up all the numbers and divide by the total number of numbers:
Mean = (2 + 5 + 25 + 35 + 42) / 5
= 109 / 5
= 21.8
Therefore, the mean of the given set of numbers is 21.8.
To find the median, we need to find the middle number in the ordered list. If there is an odd number of values, the median is the middle number. If there is an even number of values, the median is the average of the two middle numbers.
In this case, there are 5 numbers, so the median is the middle number, which is 25.
Therefore, the median of the given set of numbers is 25.
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1. A contractor is building the base of a circular fountain. On the blueprint, the base of the fountain has a diameter of 40 centimeters. The blueprint has a scale of three centimeters to four feet. What will be the actual area of the base of the fountain, in square feet, after it is built? Round your answer to the nearest tenth of a square foot.
the actual area of the base of the fountain, in square feet, after it is built is approximately 1.3 square feet (rounded to the nearest tenth of a square foot).
How to solve the question?
To find the actual area of the base of the fountain, we need to convert the measurements from the blueprint to the actual measurements.
First, we need to find the radius of the circular base. The diameter of the base is given as 40 centimeters on the blueprint, so the radius is half of that, or 20 centimeters.
Next, we need to convert the scale of the blueprint from centimeters to feet. The scale is given as three centimeters to four feet, which can be simplified to a ratio of 3:4. To convert from centimeters to feet, we need to multiply by a conversion factor of 1 foot/30.48 centimeters, since there are 30.48 centimeters in a foot.
So, to find the actual radius of the circular base in feet, we multiply the blueprint radius (20 centimeters) by the conversion factor:
20 centimeters * (1 foot/30.48 centimeters) = 0.656168 feet
Now that we have the actual radius of the circular base, we can find the actual area of the base. The formula for the area of a circle is A = πr^2, where A is the area and r is the radius. Plugging in the actual radius we just found, we get:
A = π(0.656168 feet)^2 = 1.34977 square feet
Therefore, the actual area of the base of the fountain, in square feet, after it is built is approximately 1.3 square feet (rounded to the nearest tenth of a square foot).
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.
An investment pays 14% interest compounded weekly. What percent, as a decimal, is the effective annual yield? Enter your
answer as a decimal rounded to four decimal places.
Provide your answer below:
The effective annual yield of the investment is 0.1501
What percent is the effective annual yield?To find the effective annual yield, we need to use the formula:
(1 + r/n)^n - 1
where r is the annual interest rate and n is the number of times the interest is compounded per year.
In this case, r = 0.14 (14% expressed as a decimal), and n = 52 (since interest is compounded weekly).
Plugging these values into the formula, we get:
(1 + 0.14/52)^52 - 1 = 0.1501
Therefore, the effective annual yield is 0.1501, which is equivalent to 15.01% (rounded to two decimal places).
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Evaluate the indefinite integral given below.
The indefinite integral when evaluated has a solution of 2cot(2x⁵ - 5x) + C
Evaluating the indefinite integralFrom the question, we have the following parameters that can be used in our computation:
The integral of (10 - 20x⁴)csc²(2x⁵ - 5x)
³
This can be expressed as
∫(10 - 20x⁴)csc²(2x⁵ - 5x) dx
The above is a complex expression
So, we make use of a graphing tool to evaluate the solution
Using a graphing tool, we have
Step 1:
[tex]\frac{4\cos(10x)\sin(4x^5) - 4\sin(10x)\cos(4x^5)}{sin^2(4x^5) - 2\sin(10x)\sin(4x^5) + cos^2(4x5) - 2\cos(10x)\cos(4x5)+ \sin^2(10x) + \cos^2(10x)} + C[/tex]
When simplified, we get
2cot(2x⁵ - 5x) + C
hence, the solution is 2cot(2x⁵ - 5x) + C
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Write this number in standard form 3 thousands, 16 tens,7 ones
What does the transformation f(x)
shrinks it horizontally
shrinks it vertically
ertically
stretches it horizontally
stretches it vertically
4
f(2x) do to the graph of f(x)?
The x-coordinates of all the points on the graph of f(2x) are half the x-coordinates of the corresponding points on the graph of f(x), which results in a horizontal compression or shrinking of the graph.
What is a graph?
In computer science and mathematics, a graph is a collection of vertices (also known as nodes or points) connected by edges (also known as links or lines).
The transformation f(2x) stretches the graph of f(x) horizontally by a factor of 1/2. In other words, the graph of f(2x) will be compressed horizontally compared to the graph of f(x).
To see why this is the case, consider the effect of replacing x with 2x in the expression for f(x). If we think of f(x) as a set of points in the xy-plane, then each point (x,y) on the graph of f(x) is transformed into the point (2x,y) on the graph of f(2x).
Therefore, this means that the x-coordinates of all the points on the graph of f(2x) are half the x-coordinates of the corresponding points on the graph of f(x), which results in a horizontal compression or shrinking of the graph.
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Please help me with the volume!! I beg‼️‼️‼️
Answer:
Option D) 400π cubic units.
Step-by-step explanation:
GIVEN :
Radius of cylinder = 5 unitsHeight of cylinder = 16 unitsTO FIND :
Volume of cylinderUSING FORMULA :
[tex]\quad\star{\underline{\boxed{\sf{V_{(Cylinder)} = \pi{r}^{2}h}}}}[/tex]
V = volume π = 3.14 or 22/7r = radius h = heightSOLUTION :
Substituting all the given values in the formula to find the volume of cylinder :
[tex]\quad{\sf{\dashrightarrow{V_{(Cylinder)} = \pi{r}^{2}h}}}[/tex]
[tex]\quad{\sf{\dashrightarrow{V_{(Cylinder)} = \pi{(5)}^{2}16}}}[/tex]
[tex]\quad{\sf{\dashrightarrow{V_{(Cylinder)} = \pi{(5 \times 5)}16}}}[/tex]
[tex]\quad{\sf{\dashrightarrow{V_{(Cylinder)} = \pi{(25)} \times 16}}}[/tex]
[tex]\quad{\sf{\dashrightarrow{V_{(Cylinder)} = \pi \times 25\times 16}}}[/tex]
[tex]\quad{\sf{\dashrightarrow{V_{(Cylinder)} = \pi \times 400}}}[/tex]
[tex]\quad{\sf{\dashrightarrow{V_{(Cylinder)} = 400 \pi}}}[/tex]
[tex]\quad\star{\underline{\boxed{\sf{\pink{V_{(Cylinder)} = 400 \pi \: {units}^{3}}}}}}[/tex]
Hence, the volume of cylinder is 400π cubic units.
—————————————————if a1 = 6 and an =5an-1 then find the value of a6
To find the value of a6, we need to first determine the value of a2, a3, a4, and a5 using the given recurrence relation:
a1 = 6
a2 = 5a1 = 5(6) = 30
a3 = 5a2 = 5(30) = 150
a4 = 5a3 = 5(150) = 750
a5 = 5a4 = 5(750) = 3750
Now, we can find a6 using the recurrence relation:
a6 = 5a5 = 5(3750) = 18750
Therefore, the value of a6 is 18750.
Can you help with me with question 3.
The experimental probability of tossing a 3 is 22% ( option D).
Experimental probability, which is also known as Empirical probability, is based on actual experiments and adequate recordings of the occurring of events. An experiment can be repeated a fixed number of times and each repetition is known as a trial. The formula for the experimental probability is defined by;
Probability of an Event P(E) = Number of times an event occurs / Total number of events
From the table it is visible that the occurrence of tossing 3 is 11 times.
So by the definition of experimental probability the possibility is 11/50
As the table given is the result for tossing a number cube 50 times.
In 50 times the possibility is 11
In 1 time the possibility is 11/50
In 100 times the possibility is (11×100)/50
= 22
Hence, the experimental probability of tossing a 3 is 22%.
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Downtown Mathville is laid out as a 6 x 6 square grid of streets (see diagram below). Your apartment is located at the southwest corner of downtown Mathville (see point H). Your math classroom is located at the northwest corner of downtown Mathville (see point M). You know that it is a 12-block walk to math class and that there is no shorter path. Your curious roommate (we’ll call her Curious Georgia) asks how many different paths (of length 12 blocks – you don’t want to back track or go out of your way) could you take to get from your apartment to the math class. It should also be clear that no shorter path exists. Can you solve Curious Georgia’s math problem?
Answer: 924 paths
Step-by-step explanation:
Since there is no shorter path, we know that the path must consist of 6 blocks to the north and 6 blocks to the east. Thus, the problem is equivalent to finding the number of ways to arrange 6 N's (for north) and 6 E's (for east) in a sequence such that no two N's are adjacent and no two E's are adjacent.
Let's denote N by 1 and E by 0. Then the problem is equivalent to finding the number of 12-digit binary sequences (i.e., sequences consisting of 0's and 1's) such that there are no consecutive 1's or consecutive 0's.
We can solve this problem using dynamic programming. Let F(n,0) be the number of n-digit binary sequences that end in 0 and have no consecutive 0's, and let F(n,1) be the number of n-digit binary sequences that end in 1 and have no consecutive 1's. Then we have the following recurrence relations:
F(n,0) = F(n-1,0) + F(n-1,1)
F(n,1) = F(n-1,0)
with initial values F(1,0) = 1 and F(1,1) = 1.
Using these recurrence relations, we can compute F(6,0) and F(6,1), and the total number of valid sequences is F(6,0) + F(6,1) = 132. Therefore, there are 132 different paths of length 12 blocks from your apartment to the math class.
Find the degree of the monomial. -3q4rs6
Therefore, the degree of the given monomial is 11.
What is monomial?In algebra, a monomial is an expression consisting of a single term. A term can be a constant, a variable, or the product of a constant and one or more variables. In other words, a monomial is a polynomial with only one term. The degree of a monomial is the sum of the exponents of its variables.
Here,
The degree of a monomial is the sum of the exponents of its variables.
For the monomial -3q⁴rs⁶, the degree would be:
4 + 1 + 6 = 11
Therefore, the degree of the monomial -3q⁴rs⁶ is 11.
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PROJECTILE A firework is launched from the ground. After 4 seconds, it reaches a
maximum height of 256 feet before returning to the ground 8 seconds after it was
launched. The height of the firework f(x), in feet, after x seconds can be modeled
by a quadratic function.
a. What are the zeros and vertex of f(x)?
b. Sketch a graph of f(x) using the zeros and vertex of the function. Interpret the
key features of the function in the context of the situation.
c. Write a quadratic function that represents the situation.
(a) The vertex is (6, 144),(b) When the fireworks are launched at time x = 0 and return to the earth at time x = 12 seconds, respectively, these times are denoted by zeros in the function,.(c) this is the quadratic function that represents the situation f(x) = -4 + 144.
How to deal with this problem?a. To find the zeros and vertex of the quadratic function, we need to first write it in the standard form:
[tex]f(x) = ax^2 + bx + c[/tex]
where a, b, and c are constants.
The vertex of the function is given by:
x = -b/2a
Since the quadratic function is symmetrical around the vertex, we know that the time it takes to reach the maximum height is halfway between the launch time and the time it hits the ground again. So, the time to reach maximum height is (4 + 8)/2 = 6 seconds.
Therefore, we can set up a system of equations using the information given:
f(4) = 0 (the firework is launched from the ground)
f(6) = 256 (the firework reaches its maximum height)
f(12) = 0 (the firework hits the ground again)
Plugging in the values of x and f(x), we get:
16a + 4b + c = 0
36a + 6b + c = 256
144a + 12b + c = 0
Solving this system of equations, we get:
a = -4
b = 48
c = 0
Therefore, the quadratic function that represents the situation is:
[tex]f(x) = -x^2 + 48x[/tex]
The zeros of the function can be found by setting f(x) = 0:
[tex]f(x) = -4x^2 + 48x[/tex]
0 = x(-4x + 48)
x = 0 (the firework is launched from the ground)
x = 12 (the firework hits the ground again)
The vertex can be found using the formula:
x = -b/2a = -48/(-8) = 6
So the vertex is (6, 144).
b. Using the zeros and vertex, we can sketch a graph of f(x):
The quadratic function's graph
Considering the function's primary characteristics in light of the circumstances:
The peak height of the fireworks, which occurs at x = 6 seconds and f(6) = 256 feet, is represented by the function's vertex.
The firework is at ground level at x = 0 (launch time) and x = 12 seconds (when it reaches the ground again), which are represented by zeros in the function.
The graph's form suggests that the firework rises before falling again, which is consistent with the scenario given.
c. The quadratic function that represents the situation is:
[tex]f(x) = -4x^2 + 48x[/tex]
This function can be simplified by factoring out -4:
[tex]f(x) = -4( x^2- 12x)[/tex]
Completing the square:
[tex]f(x) = -4( x^2- 12x + 36 - 36)[/tex]
[tex]f(x) = -4( (x^2-6)- 36)[/tex]
[tex]f(x) = -4(x^2-6) + 144[/tex]
This form of the function shows that the vertex is (6, 144), and that the maximum height is 144 feet.
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If ƒ (x) = 3x²+1 — 1, what is the value of f(−1), to the nearest ten-thousandth (if necessary)?
Answer:
To find the value of f(-1), we need to substitute -1 for x in the given function:
f(x) = 3x² + 1 - 1
f(-1) = 3(-1)² + 1 - 1
f(-1) = 3(1) + 0
f(-1) = 3
Therefore, f(-1) is equal to 3.
BRAINLIEST find the volume and surface area of a hypotenuse of a triangular right base that is 25 m . 7m height 24 m base? 22m length?
Answer:
Volume = (1/2)(7)(24)(22) =
1,848 cubic meters
Surface area = 2(1/2)(7)(24) + 7(22) + 22(24) + 22(25) = 1,400 square meters
A suitcase is a rectangular prism whose dimensions are 2 3 foot by 1 1 2 feet by 1 1 4 feet. Find the volume of the suitcase.
The volume of the suitcase is 35/8 cubic feet or approximately 4.375 cubic feet.
What is rectangular prism?A rectangular prism is a three-dimensional solid object that has six faces, where each face is a rectangle. It is also called a rectangular parallelepiped. A rectangular prism is a type of prism because it has a constant cross section along its length.
According to question:A rectangular prism's volume V is determined by:
V = l × w × h
where l denotes the prism's length, w its width, and h its height. Here are the facts:
l = 2 3 ft
w = 1 1/2 ft
h = 1 1/4 ft
When we enter these values into the formula, we obtain:
V = (2 3 ft) × (1 1/2 ft) × (1 1/4 ft)
= (7/3 ft) × (3/2 ft) × (5/4 ft)
= 35/8 ft³
Therefore, the volume of the suitcase is 35/8 cubic feet or approximately 4.375 cubic feet.
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20a +5,600 < 21,000 solve the following inequality and answer in interval notation
Answer: 20a +5,600 < 21,000
move the content to the right
20a < 21,000 -5600
calculate
20a<15400
20a <15400
divide both sides of the inequality by 20
a<770
Find sin(π/4). Round to 3 decimal places.
Step-by-step explanation:
sin (pi/4) = sqrt(2) / 2 = .707
you either just know this after a time or you can use a calculator (in RADIAN mode)
Answer:
sin(π/4) = sin(45°) = 0.707106781186548 ≈ 0.707 (rounded to 3 decimal places)
Step-by-step explanation:
here are the steps:
Convert π/4 to degrees: π/4 * (180/π) = 45°
Use the definition of sine to find the sine of 45°:sin(45°) = opposite/hypotenuse
In a right-angled triangle with an angle of 45°, the opposite and adjacent sides are equal, so we have:sin(45°) = opposite/hypotenuse = adjacent/hypotenuse = 1/√2
Rationalize the denominator by multiplying both the numerator and denominator by √2:sin(45°) = 1/√2 * √2/√2 = √2/2
Round to 3 decimal places: sin(45°) ≈ 0.707Therefore, sin(π/4) = sin(45°) = √2/2 ≈ 0.707 (rounded to 3 decimal places).
1 Suppose another student says he spends $29 each
week on entertainment. Will the mean and median
increase or decrease?
decreas
2 What is the new mean when the value from problem 1
is included in the data set?
Show your work. For elementary kids
Answer:
Step-by-step explanation:
Elijah is using a ladder to hang decorations for the holidays outside. He places the ladder 4 feet from the base of tree so he can reach a branch that is 12 feet from the ground. What is the angle of elevation of the ladder?
Round to the nearest tenths place if necessary.
The angle of elevation of the ladder is approximately 71.6 degrees.
What is the angle of elevation?To find the angle of elevation of the ladder, we can use trigonometry. The ladder forms a right triangle with the ground and the tree.
The base of the triangle is 4 feet, the height is 12 feet, and the hypotenuse is the length of the ladder.
Using the trigonometric function tangent (tan), we can write:
tan(angle) = opposite/adjacent
In this case, the opposite side is the height of the tree (12 feet) and the adjacent side is the base of the triangle (4 feet).
Therefore, we can calculate the angle of elevation as follows:
tan(angle) = 12/4
angle = arctan(12/4)
Using a calculator or a trigonometric table, we can find that arctan(12/4) is approximately 71.6 degrees.
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NO LINKS!! URGENT HELP PLEASE!!!!
If x < 0 and y > 0, determine the sign of the real number.
Answer:
(a) The product xy is negative because one of the factors (x) is negative and the other factor (y) is positive. Therefore, the sign of xy is negative.
(b) The expression x^2y is also negative because x^2 is positive (the square of any real number is positive) and y is positive, so their product is positive. But since x is negative, the overall product is negative.
(c) The expression x/y + x can be written as (x/x)y + x, which simplifies to y + x. Since y is positive and x is negative, the sum y + x could be either positive or negative, depending on which absolute value is greater. If |y| > |x|, then y + x is positive. If |x| > |y|, then y + x is negative.
(d) The expression y-x is positive because y is greater than x and y is positive while x is negative. So the difference y-x is positive.
100 points and I will give brainlist but before I get released, I have to verify answers
A simplification of the fractions (-5/8) ÷ (-3/4) is equal to: B. -20/24.
The step in which Johnetta made her error include the following: A. step 1.
What is a fraction?In Mathematics and Geometry, a fraction simply refers to a numerical quantity (numeral) which is not expressed as a whole number. This ultimately implies that, a fraction is simply a part of a whole number.
Based on the information provided above, the division can be calculated as follows;
Fraction = (-5/8) ÷ (-3/4)
Fraction = -5/8 × (-4/3)
Fraction = -20/24
For Johnetta, we have:
Fraction = 7/9 ÷ 3/8
Fraction = 7/9 × 8/3
Fraction = 56/27
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Please help if your good at (FUNCTION TABLE) and (nonlinear or liner or nor or both)
Please help ASAP look at the picture !
Answer:
Linear
Step-by-step explanation:
The table represents a consistent function and is therefore linear.
Consider the two-loop circuit shown below:
Ignore the red and pencil markings, just worry about the printed questions
The variables I₁ and I₂ using the matrix algebra and using the Cramer's rule are I₁ = 1 and I₂ = 1
Writing the system of equations in matrix formFrom the question, we have the following parameters that can be used in our computation:
15I₁ + 5I₂ = 20
25I₁ + 5I₂ - 30 = 0
Rewrite as
15I₁ + 5I₂ = 20
25I₁ + 5I₂ = 30
Rewrite as
I₁ I₂
15 5 20
25 5 30
From the question, the matrix form is
AI = b
Ths matrix A from the above is
[tex]A = \left[\begin{array}{cc}15&5&25&5\end{array}\right][/tex]
Ths matrix B from the above is
[tex]B = \left[\begin{array}{c}20&30\end{array}\right][/tex]
And, we have the matrix I to be
[tex]I = \left[\begin{array}{c}I_1&I_2\end{array}\right][/tex]
Finding I₁ and I₂ using the matrix algebraStart by calculating the inverse of A from
[tex]A = \left[\begin{array}{cc}15&5&25&5\end{array}\right][/tex]
So, we have:
|A| = 15 * 5 - 5 * 25
|A| = -50
The inverse is
[tex]A^{-1} = -\frac{1}{50}\left[\begin{array}{cc}5&-5&-25&15\end{array}\right][/tex]
Recall that
AI = b
So, we have
[tex]I = -\frac{1}{50}\left[\begin{array}{cc}5&-5&-25&15\end{array}\right] * \left[\begin{array}{c}20&30\end{array}\right][/tex]
Evaluate the products
[tex]I = -\frac{1}{50}\left[\begin{array}{c}5 * 20 + -5 * 30&-25 * 20 + 15 *30\end{array}\right][/tex]
[tex]I = -\frac{1}{50}\left[\begin{array}{c}-50&-50\end{array}\right][/tex]
Evaluate
[tex]I = \left[\begin{array}{c}1&1\end{array}\right][/tex]
Recall that
[tex]I = \left[\begin{array}{c}I_1&I_2\end{array}\right][/tex]
So, we have
I₁ = 1 and I₂ = 1
Finding I₁ and I₂ using the Cramer's rule,Recall that the determinant of matrix A calculated in (a) is
|A| = -50
Replace the first column in A with b
So, we have
[tex]AI_1 = \left[\begin{array}{cc}20&5&30&5\end{array}\right][/tex]
Calculate the determinant
DI₁ = 20 * 5 - 30 * 5
DI₁ = -50
Replace the second column in A with b
So, we have
[tex]AI_2 = \left[\begin{array}{cc}15&20&25&30\end{array}\right][/tex]
Calculate the determinant
DI₂ = 15 * 30 - 20 * 25
DI₂ = -50
So, we have
I₁ = DI₁ / |A| = -50/-50 = 1
I₂ = DI₂ / |A| = -50/-50 = 1
So, we have
I₁ = 1 and I₂ = 1
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A makeup artist purchased some lipsticks and wants to wrap them individually with gift wrap. Each lipstick has a radius of 0.6 inch and a height of 2.4 inches. How many total square inches of gift wrap will the makeup artist need to wrap 4 lipsticks? Leave the answer in terms of π.
Answer:
The formula for the surface area of a cylinder is:
S = 2πrh + 2πr^2
where S is the total surface area, r is the radius of the base, and h is the height.
For one lipstick, the surface area is:
S = 2π(0.6)(2.4) + 2π(0.6)^2
S = 2.88π + 0.72π
S = 3.6π
To wrap 4 lipsticks, we need to multiply this surface area by 4:
S = 4(3.6π)
S = 14.4π
Therefore, the makeup artist will need approximately 14.4π square inches of gift wrap to wrap 4 lipsticks.
Answer:
Step-by-step explanation:
Total surface area of a cylinder = 2πr(r + h)
2 π (.6) (.6 + 2.4)
2 π .6 (3)
1.2π (3)
3.6 π square inches
Mulitply by four for four lipsticks:
3.6π × 4 = 14.4π sq inches
The Wills Tower (formerly known as the Sears Tower) in Chicago is about 454 feet tall A model of it has a scale of 2 in 45 feet. How tall is the model?
The model is 64.62 inches tall. The solution has been obtained by using the arithmetic operations.
What are arithmetic operations?
Any real number may be explained using the four basic operations, also referred to as "arithmetic operations." In mathematics, operations like division, multiplication, addition, and subtraction come first, followed by operations like quotient, product, sum, and difference.
We are given that height of tower is 1454 feet and the scale is given as follows:
2 inches = 45 feet
Now, using the division operation, we get
⇒ Height of the model = 1,454 ÷ 45
⇒ Height of the model = 32.31
Now, using the multiplication operation, we get
⇒ Height of the model = 32.31 * 2
⇒ Height of the model = 64.62 inches
Hence, the model is 64.62 inches tall.
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