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vodka [1.7K]
3 years ago
8

Y is directly proportional ( x+2)² when x = 8 y= 250 find y when x = 4​

Mathematics
1 answer:
sladkih [1.3K]3 years ago
8 0

Answer:

y=90 when x=4

Step-by-step explanation:

We are given that

y\propto (x+2)^2

When x=8 and y=250

We have to find the value of y when x=4

y=k(x+2)^2

Where k= Proportionality constant

Substitute the values

250=k(8+2)^2

250=100k

k=\frac{250}{100}

k=5/2

Now, substitute x=4 and k=5/2

Then, we get

y=\frac{5}{2}(4+2)^2

y=\frac{5}{2}\times 36

y=90

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