Question

Please explain this step by step and solve within 10-20 minutes please

Answer 1

`y=(306)/(7)` is the answer.

In decimal y = 43.71

Explanation:

Given:

y varies directly with x .

Also x = 7 when y = 18

To Find:

y = ? when x = 17

Solution:

y varies directly with x .

i.e. y is directly proportional to x

∴
`y = k* x`

Where

k = constant of proportionality {Remain Same}

First we will find constant of proportionality k,

∴ When x = 7 and y = 18 we have

∴
`18 = k* 7\\\\k=(18)/(7)`

Now when x= 17 and
`k=(18)/(7)` we have

∴
`y = k* x`

∴
`y=(18)/(7)* 17\\\\y=(306)/(7)\\\\ y=43.71`