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Misha Larkins [42]
3 years ago
5

The variables x and y are related proportionally. When x=12, y=8. Find x then y=12.

Mathematics
1 answer:
erastova [34]3 years ago
6 0
I don't know if this is correct..
warning: I may be wrong

so you have to do a proportion..

it's easy!

x1/y1 = x2/y2

so, plug in the values!

12/8 = x/12

now solve for x.

cross multiply:
8x = 144
divide by 8:
x = 18

there!

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3 years ago
A plane can fly 520 miles in the same time as it takes a car to go 200 miles. If the car travels 80 mph slower than the plane, f
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Answer: the speed of the plane is 130 mph

Step-by-step explanation:

Let x represent the speed of the plane. If the car travels 80 mph slower than the plane, then the speed of the car would be (x - 80) mph.

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8 0
3 years ago
Sin 30 = <br><br> A. Cos 30<br> B. Sin 60<br> C. Tan 60<br> D. Cos 60
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