Module 4
16. What is the value of 4abc when a=2,b=3 and c=-2?
A. -48
B.48
C.-12
D. 12
17. Evaluate the algebraic expression 2xy-xyz, when x=1, y=2,2=-1.
A. 2
B. -2
C. 6
D. -6
18. What I the sum of 3x2 - 4x - 2,2x2 – X+2, and 3x2 - 4x - 5?
A. 8x-1
B. 8x+1
C.8x2 + x + 5
D.8x2 - x - 5
19. From 7x-3y, subtract 7x+3y
A. 6Y
B.-6Y
C.14X-6Y
D. 14c+6y
20. What I the perimeter of the triangle whose sides are 3x2-7cm, 2x2 - 2cm and 5x2 + 7cm?
A. 10X2 - 2cm
B. 10X2 + 2cm C. -10X2 - 2cm
D.-10x2 + 2cm
-