3 years ago

Suppose that y varies directly with x, and y=4 when x=20. find y when x=9

Mathematics

1 answer:

Llana [10]3 years ago

6 0

Answer:

y = 1.8

Step-by-step explanation:

y=kx

4=k(20)

k= $\frac{1}{5}$

When x = 9:

$y=\frac{1}{5} x=\frac{1}{5} (9)\\y=(\frac{9}{5}) = 1.8$

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