Question

Y is inversely proportional to 7I+x.
When x = 8, y = 2.
Find y when x= 15.​

Answer 1

I am taking 7I+x to mean 71+ x.

Answer: y=1.837

Explanation:

Step 1

Let y is inversely proportional to 7I+x be mathematically be written as

y ∝ 1/7I+x

Introducing our proportionality of constant , K we have that

y ∝ 1/7I+x

y =K 1/7I+x

y= K/ 7I+xh

Step 2

so when x= 8, and y =2, k becomes

y= K/ 7I+x

k= y x (7I+x)

=2 x (71 + 8)

2x 79

=158

when x= 15, y =?

y= K/ 7I+x

y= 158/ 71 + 15

y=158/86

y=1.837