Factor completely.x3 - 16x + 5x2 - 80
A. (x2 - 16)(x + 5)
B. (x - 4)2(x + 5)
C. (x + 4)(x - 4)(x + 5)
D. prime
Answer: C
Mathematics
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Replace the polar equation with an equivalent Cartesian equation.r cos ? = 9
A. y = 9 B. x = 9 C. 9y = 1 D. 9x = 1
Mathematics
A one-to-one function f is given. Find f-1(x) and graph f(x) with a solid line and f-1(x) with a dotted line on the same axes.f(x) = 3x
A. f-1(x) = - 
B. f-1(x) = - 
C. f-1(x) = 
D. f-1(x) = 
Mathematics
Translate the indicated expression.Diana has thirteen coins in her change purse that are all either dimes or quarters. If d represents the number of dimes she has, then write an expression in terms of d that describes the number of quarters.
A. d + 13 B. 13 ÷ d C. d - 13 D. 13 - d
Mathematics
Factor.x2 - x - 72
A. (x + 8)(x - 9) B. (x + 9)(x - 8) C. Prime D. (x + 1)(x - 72)
Mathematics