Question

I really need answers asap please.

how do i evaluate the following expressions:

•x=-5 and y=11

•4y-10x

•x to the power of 3

•6y to the power of 2

•5 (3x+2y)

•(y-x) to the power of 2

Answer 1

We're told x=-5 and y=11 and asked to evaluate a few expressions. That just means substitute these values into the expressions and compute the exact numerical answer.

`4y-10x = 4(11) - 10(-5) = 44 + 50 = 94`

Answer: 94

x to the power of 3

`x^3 = (-5)^3 = -5 * -5 * -5 = -125`

Answer: -125

•6y to the power of 2

Probably means

`6y^2 = 6(11)^2 = 6(121) = 726`

Answer: 726

`5(3x+2y) = 5(3(-5) + 2(11)) = 5(-15 + 22) = 5(7) = 35`

Answer: 35

•(y-x) to the power of 2

`(y - x)^2 = (11 - -5)^2 = 16^2 = 256`

Answer: 256