Factor the sum or difference of cubes. 64r3 - 125
A. (4r + 5)(16r2 + 20r + 25)
B. (4r - 5)(16r2 - 25)
C. (4r - 5)(16r2 - 20r - 25)
D. (4r - 5)(16r2 + 20r + 25)
Answer: D
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Factor.25k2 - 121j2
A. (5k - 11j)2 B. (5k - 11j)(5k + 11j) C. 55(k - j)(k + j) D. cannot be factored
Solve the problem. Write your answer using scientific notation.If the speed of light is 3.00 × 108 m/sec, how long does it take light to travel 
the distance from the sun to Mars?
A. 7.6 × 102 min B. 7.6 × 102 sec C. 76 sec D. 7.6 × 103 sec
Solve the problem.Suppose that a consumer loan of $1200 is made with a monthly rate of 2% simple interest and a monthly payment of $200.(a) Write the difference equation for yn, the balance owed after n months.(b) How much is owed on the loan after four payments?(c) How much interest has been paid on the loan after five months?
What will be an ideal response?
Find values of x and y such that both fx(x, y) = 0 and fy(x, y) = 0.f(x,y) = x3 - 4xy + 8y
A. x = 0, y = 0
B. x = 2, y = 2
C. x = 2, y = 3
D. x = 
, y = 2