Multiply the polynomials.(10m + 11n)(9m2 - 2mn - 5n2)
A. 90m3 - 20m2n - 50mn2 + 11n3
B. 90m3 + 119m2n + 72mn2 - 55n3
C. 90m3 + 79m2n - 50mn2 - 55n3
D. 90m3 + 79m2n - 72mn2 - 55n3
Answer: D
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A. 6.93% B. 8.67% C. 10.40% D. 7.80%
Provide an appropriate response.The total price of some lumber was $450. This price includes the sales tax of 5%. How much was the lumber?
Fill in the blank(s) with the appropriate word(s).
Solve the problem.Suppose that the radius r and the circumference C = 2?r of a circle are differentiable functions of t. Write an equation that relates dC/dt to dr/dt.
A. 
= 2?r
B. 
= 
C. 
= 2?
D. 
= 2?
Solve and check. Note that the equation could be an identity or a contradiction.12n + 2(n - 3) = 11 + 5(2n - 1)
A. 
B. 6
C. - 
D. 3