Answer:
John is 20 years old.
Step-by-step explanation:
Given the second mean is 18, it is equal to the first mean age plus John's unknown age. The sum is also divided by 2 because there are 2 values in the sum (1. John's age and 2. the mean, 16 yrs old).
Set up an equation: [tex]\frac{x+16}{2}=18[/tex]
multiply both sides by 2: [tex]x+16=36[/tex]
simplify: [tex]x=20[/tex]
A cast iron pipe used as a water main for a home has an outer diameter of 8 in. If the pipe has a thickness of 0.25 in, what volume of iron does 24 in of pipe contain? Answer in cubic inches.
Sheryl makes $7 per pair of
earrings, e, and $13 per necklace,
n, she sells. What expression
represents her total income?
The expression T = 7e + 13n represents the total income of Sherly where e is the number of earrings she sells and n is the number of necklace she sells.
What is an expression?It is defined as the combination of constants and variables with mathematical operators.
We have:
Sheryl makes $7 per a pair of earrings, e, and $13 per necklace, n, she sells.
Let's suppose the total income of Sherly is T:
Then,
T = 7e + 13n
Here e is the number of earrings she sells and n is the number of necklace she sells.
T is the total income and the expression T = 7e + 13n represents the total income of Sherly.
Thus, the expression T = 7e + 13n represents the total income of Sherly where e is the number of earrings she sells and n is the number of necklace she sells.
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help help help
help help help meeee help me help me
Prove that √2 is an irrational number and hence show that 3+5√3 is also irrational
Answer:
square rooted numbers like the square root of 2 are irrational because when calculated they don't equal a whole number.
Step-by-step explanation:
3+5√3 = 11.66 // not whole - irrational
√2 = 1.4 // not whole - irrational
√25 = 5 // whole - rational
PLEASE HELP DOINF THIS RIGHT NOW AND DONT HAVE MUCH TIME!!
Which of the following measures would give you an infinite number of possible triangles?
26°,42°, and 106°
34°,63°, and 79°
62°,34, and 80°
Three angles: 43°,62°, and 75°
Answer: number 4 (43º, 62º, 75º)
Step-by-step explanation:
26 + 42 + 106 ≠ 180 so number 1 is not a triangle.
34 + 63 + 79 ≠ 180 so number 2 is not a triangle.
62 + 34 +80 ≠ 180 so number 3 is not a triangle.
43 + 62 + 75 = 180 so number 4 is a triangle.
Because only the angles are given and not the sides, there is an infinite number of triangles. The answer is number 4 (43º, 62º, 75º).
Please help me thanks!
Answer: See the screenshot below.
Explanation:
We'll be using these trig functions
sine = opposite/hypotenusecosine = adjacent/hypotenusetangent = opposite/adjacentThe inverse of those help us find the angle. Notation like arcsine is the same as inverse sine denoted as [tex]\sin^{-1}[/tex] on many calculators.
The decimal results are approximate.
!20 PTS!
Find point Z that partitions the directed line segment XY in the ratio of 2:1 where X(1, 2) and Y(7, 5). EXPLAIN IN STEPS.
Find the coordinates of P so that P partitions segment AB in the part-to-whole ratio of 1 to 5 with A(-9, 3) and B(1, 8). EXPLAIN IN STEPS.
For both problems, we can use the section formula.
1) [tex]Z=\left(\frac{(2)(7)+(1)(1)}{3}, \frac{((2)(5)+(1)(2)}{3} \right)=\boxed{(5, 4)}[/tex]
2) [tex]P=\left(\frac{(1)(1)+(5)(-9)}{6}, \frac{(1)(8)+(5)(3)}{6} \right)=\boxed{\left(-\frac{22}{3}, \frac{23}{6} \right)}[/tex]
Select all the conditions for which it is possible to construct a triangle.
The conditions for which it is possible to construct a triangle include:
A triangle with angles measures 60 ∘ , 80 ∘ , and 80 ∘ A triangle with side lengths of 4 cm, 5 cm, and 6 cm A triangle with side lengths 4 cm and 5 cm and a 50 ∘ angle.What is a Triangle?
This is defined as a three-sided polygon which has three edges and three vertices and a total internal angles of 180 degrees.
The triangle with side lengths 4 cm, 5 cm, and 15 cm can't be constructed due to the length of sides not being equal according to pythagoras theorem.
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A neighborhood is trying to set up school carpools, but they need to determine the number of students that need to travel to the elementary school (ages 5–10), the middle school (ages 11–13), and the high school (ages 14–18). A histogram summarizes their findings:
Answer:The data set that is represented in the histogram is {5, 6, 5, 11, 12, 13, 12, 13, 14, 15, 11, 18, 17, 13} Definition of a histogram An histogram is a graph that organises numerical data. The histogram is made up of rectangles whose area is equal to the frequency of the data and whose width is equal to the class interval. the frequency is usually on the vertical axis while the class interval is usually on the horizontal axis.Explaining the graphLooking at the histogram, the age group of 5 - 10 have 3 children in the carpool. the age group of 11 - 13 have 7 children in the carpool. the age group of 14 - 18 have 4 children in the carpool. This means that there are 14 children in the carpool. The correct option should have 14 ages that range between 5 and 18. Here are the options of this question: A. {3, 3, 3, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4} B. {5, 10, 4, 11, 12, 13, 12, 13, 12, 11, 14, 14, 19, 18} C. {5, 6, 5, 11, 12, 13, 12, 13, 14, 15, 11, 18, 17, 13} D. {3, 5, 10, 11, 13, 7, 18, 14, 4}
Step-by-step explanation:
Is the number 351 a
composite number?
Solve for x:
(x − 2)(x + 7) = −1+2x
Answer:
(-3±√61)÷2
Step-by-step explanation:
First we expand the brackets to give us :
x²+5x-14 = -1 +2x
Now we make this into the quadratic format (x²+ax+b=0) by subtract -1 and 2x from both sides :
x²+3x-13 = 0
This quadratic cannot be factorized so we must use the quadratic formula :
x = [tex]\frac{-b+\sqrt{b^{2} -4ac} }{2a}[/tex] or x = [tex]\frac{-b-\sqrt{b^{2} -4ac} }{2a}[/tex]
a = 1 , b = 3 , c = -13
Now we simplify as much as possible by first substituting values known :
x = [tex]\frac{-3+\sqrt{3^{2} -4(1)(-13)} }{2(1)}[/tex] or x = [tex]\frac{-3-\sqrt{3^{2} -4(1)(-13)} }{2(1)}[/tex]
Now we evaluate the exponent :
x = [tex]\frac{-3+\sqrt{9 -4(1)(-13)} }{2(1)}[/tex] or x = [tex]\frac{-3-\sqrt{9 -4(1)(-13)} }{2(1)}[/tex]
Now we multiply the numbers :
x = [tex]\frac{-3+\sqrt{9 +52 } }{2(1)}[/tex] or x = [tex]\frac{-3-\sqrt{9 +52 } }{2(1)}[/tex]
Now we add the numbers :
x = [tex]\frac{-3+\sqrt{61} }{2(1)}[/tex] or x = [tex]\frac{-3-\sqrt{61} }{2(1)}[/tex]
Now we multiply the denominator:
x = [tex]\frac{-3+\sqrt{61} }{2}[/tex] or x = [tex]\frac{-3-\sqrt{61} }{2}[/tex]
So our final answer is (-3±√61)÷2
Hope this helped and 5 stars, a heart and brainliest please
Question 25 of 25
Over what interval is the function in this graph increasing?
AV
M
<-10
10
A. 6≤x≤ 10
B. -4≤x≤1
C. -10≤x≤-4
D. 1≤x≤6
The correct option is option B : -4 ≤ x ≤ 1
What is Increasing and decreasing function?
Increasing and decreasing functions are functions whose graphs go upwards and downwards respectively as we move towards the right-hand side of the x-axis. Increasing and decreasing functions are also called non-decreasing and non-increasing functions.
Here, from graph
as we can observe from x = -4 graph starts increases upto x = 1 and after that graph becomes constant.
Thus, between x belongs -4 to 1 the graph is increasing.
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A boat is heading towards a lighthouse, where Luis is watching from a vertical distance of 107 feet above the water. Luis measures an angle of depression to the boat at point A to be 10 degrees. At some later time, Luis takes another measurement and finds the angle of depression to the boat (now at point B) to be 39 degrees. Find the distance from point A to point B. Round your answer to the nearest foot if necessary.
The distance between point A to point B is 115.91 ft if the boat is heading towards a lighthouse, where Luis is watching from a vertical distance of 107 feet above the water.
What is trigonometry?Trigonometry is a branch of mathematics that deals with the relationship between sides and angles of a right-angle triangle.
We have:
A boat is heading towards a lighthouse, where Luis is watching from a vertical distance of 107 feet above the water. Luis measures an angle of depression to the boat at point A to be 10 degrees.
From the above information, we can draw a right-angle triangle.
Let's suppose the distance between point A and point B is x
In right-angle triangle, BCD
tan31 = DC/BC = 107/BC
BC = 107/tan31
BC = 178.07 ft
In right-angle triangle, ACD
tan20 = DC/AC
tan20 = 107/(x + BC)
Plug the value of BC
tan20 = 107/(x+178.07)
x + 178.07 = 293.980
x = 115.91 ft
Thus, the distance between point A to point B is 115.91 ft if the boat is heading towards a lighthouse, where Luis is watching from a vertical distance of 107 feet above the water.
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PLEASE HELP ILL MAKE YOU THE BRAINIEST What is the value of x
[tex]~~~~~~\cos 45^{\circ} = \dfrac{\text{Base}}{\text{Hypotenuse}}\\ \\\implies \dfrac 1{\sqrt 2} = \dfrac{x}{22}\\\\\implies x = \dfrac{22}{\sqrt 2}\\\\\implies x = \dfrac{22\sqrt 2}{2}\\\\\implies x = 11\sqrt 2\\[/tex]
What is the volume of the cone? cone v = one-third b h startfraction 70 over 3 endfraction pi centimeters cubed startfraction 140 over 3 endfraction pi centimeters cubed startfraction 490 over 3 endfraction pi centimeters cubed startfraction 700 over 3 endfraction pi centimeters cubed
Using the assumed values, the volume of the cone is [tex]V = \frac {250}3\pi[/tex]
How to determine the volume of the cone?The volume of a cone is calculated using:
[tex]V = \frac 13\pi r^2h[/tex]
The parameters are not given.
So, we use the following assumed values
Radius, r = 5
Height, h =10
Using the assumed values, we have:
[tex]V = \frac 13\pi * 5^2 * 10[/tex]
Evaluate the product
[tex]V = \frac {250}3\pi[/tex]
Hence, using the assumed values, the volume of the cone is [tex]V = \frac {250}3\pi[/tex]
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Answer: C (490/3
Step-by-step explanation:
• function notation•
these are so confusing
Answer:
15
Step-by-step explanation:
Just substitute the x for 5
In this case:
Original function: f(x) = [tex]x^{2}[/tex] - 2x
Substitute function: f(5) = [tex](5)^{2}[/tex] - 2(5)
Now solve for the substitute function
[tex](5)^{2}[/tex] - 2(5)
25 - 10
15
Therefore, f(5) is equal to 15
3(x-2y)=5(x-3y)+9 write in slope intercept form help!
Answer:
y = (2x/9) + 1
Step-by-step explanation:
Solving for y we get 3(-2y+x) = 5(-3y+x)+9
Expand the above we get -6y+3x=5(-3y+x)+9
which is -6y+3x = -15y+5x+9
then 9y = 2x+9
which y = (2x/9) + 1
What is another way to write the absolute value inequality lp|≤12?
O-12≤p≤ 12
O-12≥p≤12
O-12≤por p≤ 12
O-12≥por p≤ 12
Another way to write the absolute value inequality lp|≤12 is -12≤p≤12
Inequality expressionsInequality are expression not separated by an equal sign. Given the inequality expression
lp|≤12
The modulus can be positive or negative
If positive, p ≤12 and if negative -p≤12 or p ≥- 12
Combine both solutions
-12≤p≤12
Hence another way to write the absolute value inequality lp|≤12 is -12≤p≤12
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A box contains 4 black shirts, 8 blue shirts, 4 black pants, and 10 blue pants. Determine the probability of randomly selecting a blue piece of clothing or a pair of pants. Use to explain your answer
I just need the explanation.
============================================================
Explanation:
Add up the four numbers given: 4+8+4+10 = 26 items total
Kick out the 4 black shirts since they are neither blue, nor are they pants.
So we have 26-4 = 22 items that are blue or a pair of pants (or both).
Divide that over the total (26) to get the probability we're after:
22/26 = (11*2)/(13*2) = 11/13
Side note: 11/13 = 0.8462 = 84.62% approximately
If two boats sail at a 45° angle to the wind as shown, and the wind is constant, will their paths ever cross? Explain your reasoning. Which of the angle pair did you use and what does the theorem state? wind 45° 45°
please with the explanation
What is cos B?
A. 8/15
B. 15/8
C. 8/17
D. 15/17
Answer:
C. 8/17
Step-by-step explanation:
Given:
Hypotenuse = 17
BC = 8
Cos (B) = leg adjacent to ∠B / hypotenuse
= BC/BA
Substitute
Cos (B) = 8/17
Hence option C is correct
Review the graph of f(x). What is the function’s behavior close to the vertical asymptote x = 2? Limit of f (x) as x approaches 2 minus = infinity and limit of f (x) as x approaches 2 plus = infinity Limit of f (x) as x approaches 2 minus = infinity and limit of f (x) as x approaches 2 plus = negative infinity Limit of f (x) as x approaches 2 minus = negative infinity and limit of f (x) as x approaches 2 plus = infinity
The function's behavior at vertical asymptote x = 2 is (b) [tex]\mathbf{ \lim_{x \to 2^-} f(x) = \infty\ and \ \lim_{x \to 2^+} f(x) = -\infty}[/tex]
How to determine the function's behavior?The attached graph represents the missing information in the question.
From the attached graph, we have the following highlights:
At x = 2, a curve points upwardAt x = -2, another curve points downwardThis means that the limit of f(x) approaches negative infinity and positive infinity at this value of x
Hence, the function's behavior is (b) [tex]\mathbf{ \lim_{x \to 2^-} f(x) = \infty\ and \ \lim_{x \to 2^+} f(x) = -\infty}[/tex]
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Write a polyomial equation of degree 4 that has the following roots: -1 repeated three times and 4.
The polynomial equation is P(x) = (x + 1)(x + 1)(x + 1)(x - 4)
How to determine the polynomial?The given parameters are:
Degree = 4Roots = -1 (three times) and 4A polynomial equation is represented as:
P(x) = (x- Root)
So, we have:
P(x) = (x - (-1))(x - (-1))(x - (-1))(x - 4)
Open the inner brackets
P(x) = (x + 1)(x + 1)(x + 1)(x - 4)
Hence, the polynomial equation is P(x) = (x + 1)(x + 1)(x + 1)(x - 4)
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what is the quotient of (x^3+3x^2-4x-12) divided by (x^2+5x+6)
Answer:
x - 2
Step-by-step explanation:
x^3 + 3x^2 - 4x - 12 simplifies to (x + 2)(x - 2)(x + 3)
x^2 + 5x + 6 simplifies to (x + 2)(x + 3)
(x + 2)(x - 2)(x + 3)
(x + 2)(x + 3)
The (x + 2) and (x + 3) cancel
x - 2
Kayden Kohl
9th Grade Student
(Algebra 2)
Image is attached
Find x and y of 2 similar polygons
Answer:
11
Step-by-step explanation:
10/15=6/x-2
then solve for x
x=11
The Saxena family plans to install a light to illuminate part of their rectangular yard. Nikki and Dylan each proposed a different spot to place the light. The proposed placements and the lit area that each produces are shown below.
Nikki's proposed placemat has a triangular light area with a base of 60 feet and height of 38 feet. Dylan's proposed placemat has a base of 60 feet and a height of 38 feet.
How do Nikki’s and Dylan’s proposals compare? Check all that apply.
Nikki’s proposed placement will light a greater area than Dylan’s placement.
Dylan’s proposed placement will light a greater area than Nikki’s placement.
Both proposed placements will light the same sized area.
Nikki’s proposed placement will light more than half the yard.
Dylan’s proposed placement will light more than half the yard.
Dylan’s proposed placement will light exactly half of the yard.
Nikki’s proposed placement will light less than half of the yard.
The correct situation for the given condition are as follows:
C) Both proposed placements will light the same sized area.
F) Dylan's proposed placement will light exactly half of the yard.
What is Area of Triangle?
The area of a triangle is defined as the total space occupied by the three sides of a triangle in a 2-dimensional plane. The basic formula for the area of a triangle is equal to half the product of its base and height, i.e., A = 1/2 × b × h.
The area of a triangle = (base x height) / 2
and,
both lights illuminate the same base and height = (60 x 38) / 2
= 1,140 sq ft
Both Dylan's and Nikki's proposed placement will lit exactly half of the yard.
The yard's total area = 60 x 38 = 2,280 sq ft,
which is twice the area lit by the lights.
Thus, The correct situation for the given condition are as follows:
C) Both proposed placements will light the same sized area.
F) Dylan's proposed placement will light exactly half of the yard.
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Complete the proof to show that ABCD is a parallelogram.
PROOF:
BC ║ AD and CD ║ BA because the ________________________________. Therefore, ABCD is a parallelogram because both pairs of opposite sides are parallel.
OPTIONS:
A) lengths of consecutive sides are not equal
B) slopes of opposite sides are equal
C) lengths of opposite sides are equal
D) slopes of consecutive sides are not equal
IMAGE:
In the proof given, BC║AD and CD║BA because: B. slopes of opposite sides are equal.
What is the Slope of Parallel Lines?If two lines are parallel, they will have the same slope value,.
Slope = rise/run.
Slope of BC = rise/run = -2/5
Slope of AD = -2/5
Slope of BA = rise/run = -6/1 = -6
Slope of BA = rise/run = -6/1 = -6
Therefore, we can conclude that BC║AD and CD║BA because: B. slopes of opposite sides are equal.
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Each statement describes a transformation of the graph of y=x. which statement correctly describes the graph of y=x-9?
A. It is the graph of y+x translated down 9 units.
B. It is the graph of y+x, where the slope is decreased by 9
C. It is the graph of y+x translated to the left 9 units.
D. It is the graph of y+x translated up 9 units.
help me please I will give you brainliest
Answer:
-17, -10, -6, -5, 3, 8 only change is between 3 and 8
After six weeks of the coupon offer, the owner of the restaurant needs to decide if the restaurant should continue to run the same special or offer a new one. Use the provided scatter plot to write an equation for the line of best fit.
The equation of the line of the best fit on the scatter plot is y = 150x + 598
How to determine the equation of the line of best fit?From the line in the scatter plot, we have the following points
(x,y) = (3,1048) and (6,1498)
The equation is then calculated using:
[tex]y = \frac{y_2 -y_1}{x_2 -x_1} *(x - x_1) + y_2[/tex]
The equation becomes
[tex]y = \frac{1498 -1048}{6 - 3} *(x - 3) + 1048[/tex]
Evaluate
y = 150 *(x - 3) + 1048
Expand the bracket
y = 150x - 450 + 1048
Evaluate the sum
y = 150x + 598
Hence, the equation of the line of the best fit is y = 150x + 598
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