b. 2(x+y) - 10 c. -2(x+y)10
d. 10x2(x+y)
B 4. If x=2, what is the value of x2 - x +47
b. 6 C. 8
d. 10
5. When x=-2, which expression has the value -64?
b. 2x3
c. (3x)?
d. (2x)
a. 3x2​