Question

Evaluate the expressions when x = 1/2 and y = -3.

1. -4xy
-4 * .5 * -3 = 6

2. 6x - 3y
6(.5) - 3(-3)

3. -5y + 8x + 1
-5(-3) + 8(.5) + 1 = 20

4. -x^2 - y + 2
-0.5^2 - (-3) + 2 = 4.75

5. 2x + 4 (x + .5) + 7
2(.5) + 4 (-3 + .5) + 7 = -2

6. 2(4x - 1)^2 - 3
2(4(.5) - 1)^2 - 3 = -1

Answer 1

looks good to me.
nice work.