Find the value of the expression 2x + 3y – 4, when x = 4 and y = -2

A. -2
B. -3
C. -4
D. -5

_____6. What is the sum of 5a2 + 13ab – 8b2 and 7ab – b2 + 4a2?

A. 9a2 + 20ab – 9b2

B. 9a2 – 20ab – 9b2
C. 9a2 + 20ab + 9b2
D. -9a2 + 20ab – 9b2

_____7. Find the sum of -7x2 + 3x – 6 and 8x + 3x2 + 5.

A. 4x2 + 11x – 1 C. -4x2 + 11x + 1

B. 4x2 + 11x – 1 D. -4x2 + 11x – 1

_____8. . Find the difference between x – 3x2 + 4 and 2x2 + 5x + 3.

A. -5x2 - 4x + 1 C. 5x2 - 4x + 1

B. -5x2 + 4x + 1 D. 5x2 + 4x + 1

_____9. What must be added to x3 – 2x + 5 to get 2x3 + x2 - 3?

A. x3 + x2 + 2x + 8

B. x3 + x2 + 2x – 8
C. 3x3 + x2 - 2x + 2
D. 3x3 + x2 - 2x – 2

_____10.Subtract -2x2 + 10 from 6x2 -2x + 10

A. 8x2 – 2x C. 4x2 – 2x

B. 8x2 – 2x - 20 D. 4x2 – 2x - 20​