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3 years ago

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3 Select the correct answer. The variable y varles directly as x. When x = 20, y= 12. What is the value of y when x= 15?

2 answers:

stepladder [879]3 years ago

4 0

Answer:

B

Step-by-step explanation:

Given y varies directly as x, then the equation relating them is

y = kx ← k is the constant of variation

To find k use the condition when x = 20, y = 12, then

12 = 20k ( divide both sides by 20 )

k = $\frac{12}{20}$ = $\frac{3}{5}$

y = $\frac{3}{5}$ x ← equation of variation

When x = 15, then

y = $\frac{3}{5}$ × 15 = 9

liraira [26]3 years ago

3 0

Answer:

B.9

Step-by-step explanation:

What I did is I used ratio.

20:12

15:X

Cross multiply:15x12

Answer:180

The answer you get divided by 20.

180/20=9.

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3 years ago

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$\huge\text{Hey there!}$

$\mathsf{2 \bullet (3 + 5 - 1) \bullet 2}$

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$\mathsf{= 28}$

$\huge\textsf{Therefore, your answer should be: }$

$\huge\boxed{\frak{28}}\huge\checkmark$

$\huge\text{Good luck on your assignment \& enjoy your day!}$

<h3>
~ $\frak{Amphitrite1040:)}$ </h3>

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2 years ago

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