Question

T= 3x + 4y
Toe ons
(a) Work out the value of I when x = 5 and y=-7

Answer 1

Note: Consider the dependent variable is T instead of I, and we need to find the value of T when x=5 and y=-7.

Given:

`T=3x+4y`

To find:

The value of T when x=5 and y=-7.

Solution:

We have,

`T=3x+4y`

Putting x=5 and y=-7, we get

`T=3(5)+4(-7)`

`T=15-28`

`T=-13`

Therefore, the value of T is -13 when x=5 and y=-7.