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2 years ago

The value of y varies directly with c. If x = 2, then y = 7. Find the value of x if y = 84.

Mathematics

2 answers:

elena-14-01-66 [18.8K]2 years ago

8 0

We are given that y varies directly with c.

We need a constant of proportionality. I decided to let c be the constant of proportionality.

y = cx

7 = 2c

7/2 = c

We are now given the value of y to be 84 and must find x.

y = cx

84 = (7/2)x

84 ÷ (7/2) = x

24 = x

shtirl [24]2 years ago

3 0

Answer:

x=24

Step-by-step explanation:

y = x*c

x=2, y=7

2*c=7 => c=7/2

x*7/2 = 84

x = 84*2/7

x = 12*2

x = 24

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3 years ago

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3 years ago

The value of y varies directly with c. If x = 2, then y = 7. Find the value of x if y = 84.​

The value of y varies directly with c. If x = 2, then y = 7. Find the value of x if y = 84.