Factor by any method.8s3 + 1
A. (2s + 1)(4s2 + 1)
B. (8s + 1)(s2 - 2s + 1)
C. (2s + 1)(4s2 - 2s + 1)
D. (2s - 1)(4s2 + 2s + 1)
Answer: C
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Simplify by removing parentheses and collecting like terms.-6r + 15 - (2r + 7) - 5(7r + 8)
A. 43r + 15 B. -39r - 18 C. -43r + 48 D. -43r - 32
Solve the problem.From a point on a straight road, two cars are driven in opposite directions, one at 60 miles per hour and the other at 58 miles per hour. In how many hours will they be 472 miles apart?
A. 4 hours B. 3 hours C. 5 hours D. Not enough information
Use reference angles to find the exact value of the expression. Do not use a calculator.cot 
A. - 
B. 
C. -
D. 
Use an inverse matrix to solve the given system of equations. 5x + 4y = 8-4x + 2y = -22
A. (4, -3) B. (3, -4) C. (-4, 3) D. (-3, 4)