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

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:

To find:

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

Solution:

We have,

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

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

d) 30 units^2

area of rectangle = l × b

we know,

length = 10 unit

breadth = 3 unit

applying the formula,

= l × b

= 10 × 3

= 30 unit^2

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step-by-step explanation: