Question

Evaluate -8y - 4x
When x = -6. y = 9

Answer 1

-48

Explanation:

We are given the expression:

`-8y-4x`

and asked to evaluated when x= -6 and y=9. Therefore, we must substitute -6 in for x and 9 in for y.

`-8(9)-4(-6)`

Solve according to PEMDAS: Parentheses, Exponents, Multiplication, Division, Addition, Subtraction.

Multiply -8 and 9 ⇔ -8*9= -72

`-72-4(-6)`

Multiply -4 and -6 ⇔ -4*-6=24

`-72+24`

Add 24 to -72.

`-48`

The expression -8y-4x when evaluated at x=-6 and y=9 is equal to -48.

Answer 2

-8(9)= -72; -4(-6)= 24; -72+24= -48