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.