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Nikitich [7]
3 years ago
12

Billy's age is twice Joe's age and the sum of their ages is 45. How old is Billy?

Mathematics
1 answer:
Fed [463]3 years ago
4 0

Answer:

30 years old

Step-by-step explanation:

Joe's age can be set to x. Since Billy is twice as old as Joe, his age can be set to 2x. They add up to 45. You can set up an equation, 2x+x=45.

Simplify the equation.

3x=45, x=15

Joe is 15. Billy is 2(15)=30.

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The product of 5 and 2 less than triple a number equals the product of 7 and 8 more than twice the number. What is the number?
Oksi-84 [34.3K]

Answer:Hi,

Let the number be x

Twice the number is 2x

Five less than twice the number is 2x-5, which is given as 9

Therefore, 2x-5 = 9

or, 2x = 9+5

or, 2x = 14

or x=7

Thus the number is 7.

Cheers

Step-by-step explanation:

5 0
2 years ago
How do you find x and y?
alexandr1967 [171]
Y=180-111=69
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3 years ago
A linear equation in the form of y=mx+b
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Answer:

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Step-by-step explanation:

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4 0
3 years ago
The perimeter, P, of a rectangle is the sum of twice the length and twice the width.
LekaFEV [45]
The answer is P = 2(l+w) units.

This is because when you let the perimeter of the rectangle be P, the length of the rectangle be l and the width of the rectangle be w.

The information above can be expressed as the following equation,
P = 2l + 2w

You can then factorise out the common factor, 2.
P = 2(l+w)

Thus, the answer is P = 2(l+w) units.
3 0
3 years ago
Read 2 more answers
I forgot how to find the x coordinates for the intersection already :( I will be very much appreciated if I could get a step by
mr_godi [17]

In the graph,

Amplitude = 1.5 units

Period = 180°

The x-intercepts are 40°, 140°, 220°, and 320°

<h3>Determining x-intercepts </h3>

From the question, we are to determine the amplitude, period and the x-intercepts of the given graph

Amplitude is the distance from rest to crest.

In the graph,

Amplitude = 1.5 units

Period is how long from crest to crest OR trough to trough

In the graph,

Period = 180°

x-intercepts refers to the points where the graph cuts the x-axis

In the graph,

The x-intercepts are 40°, 140°, 220°, and 320°

Learn more on Determining x-intercepts here: brainly.com/question/24148225

#SPJ1

6 0
2 years ago
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