Question

Evaluate each expression if a = 1/2, a = 15, and c = 9.

Answer 1

`b^2-5c`

The value of b is 15 and the value of c is 9, then

We will substitute b in the expression by 15 and c by 9

`b^2-5c=(15)^2-5(9)`

Since (15)^2 = 15 x 15 = 225

Since 5 x 9 = 45, then

`b^2-5c=225-45`

Subtract 45 from 225

`b^2-5c=180`

The value of it is 180