Simplify the polynomial by combining like terms.8ab + 20 + 15ab2 + 12 + 3ab2 + 5ab + 7a2b2
A. 7a2b2 + 18ab2 + 13ab + 32
B. cannot be simplified
C. 25a2b2 + 13ab + 32
D. 7a2b2 + 31ab2 + 32
Answer: A
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Solve the problem.If you roll a 1-m-diameter wheel forward 36 centimeters over level ground, through what angle (to the nearest degree) will the wheel turn?
A. 72° B. 1° C. 21° D. 41°
Solve the problem.Assume that the sales of a computer retail store are approximated by a linear function. Sales were 
in 1984 and 
in 1989. Let x = 0 represent 1984. Find the equation giving yearly sales. Estimate sales in 1992.
A. y = 340,000x + 770,000 y = 3,830,000 in 1992 B. y = 510,000x + 770,000 y = 4,850,000 in 1992 C. y = 408,000x + 770,000 y = 4,034,000 in 1992 D. y = 510,000x + 770,000 y = 4,340,000 in 1992
Perform the matrix operation.Let C =
. Find 
C.
A. 
B. 
C. 
D. 
Solve the system.
y2 = -2x y2 = x + 2
A. (0.4, ±
)
B. (0.7, ±
)
C. (-0.7, ±
)
D. (-0.4, ±
)