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zvonat [6]
3 years ago
13

the variable Y is directly proportional to the variable X if Y= 32 when X= 20 what is the value of x when y= 40​

Mathematics
2 answers:
Karolina [17]3 years ago
3 0

Answer:

x = 25

Step-by-step explanation:

A directly proportional relationship satisfies a proportion or two equal ratios. You can create a ratio between x and y coordinates written as y/x.

So when y = 32 and x= 20, the ratio is 32/20. If y = 40, what is x? This is the ratio 40/x. Set them equal in a proportion. Then cross multiply to solve for x.

\frac{32}{20} = \frac{40}{x}

32(x) = 20(40)

32x = 800

x = 25

MrMuchimi3 years ago
3 0

Answer:

25

Step-by-step explanation:

25

y = kx

32 = 20k

8

5

= k

40 =

8

5

x

5

8

(40) = x

25 = x

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==============================================

Work Shown:

I'm going to assume that the 4s go on forever. I'll represent this with three dots after the last 4 like so
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