Translate the phrase to an algebraic expression. Use "x" to represent "a number". A number subtracted from - 
A. x - 
B. 
- x
C. - 
- x
D. x - 
Answer: C
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Provide an appropriate response.A common factor of the expression xy + xz is 
.
A. y B. x C. y + z D. z
Solve the problem.A stone is thrown into a pond. A circular ripple is spreading over the pond in such a way that the radius is increasing at the rate of 5.2 feet per second. Find a function, r(t), for the radius in terms of t. Find a function, A(r), for the area of the ripple in terms of r. 
A. (A ? r)(t) = 27.04?2t B. (A ? r)(t) = 5.2?t2 C. (A ? r)(t) = 27.04?t2 D. (A ? r)(t) = 10.4?t2
Solve the problem.The Cool Company determines that the supply function for its basic air conditioning unit is 
and that its demand function is 
, where p is the price. Determine the price for which the supply equals the demand.
A. $21.36 B. $21.86 C. $22.86 D. $22.36
Translate to a proportion and solve. What percent of 160 is 40?
A. 26% B. 25% C. 4% D. 5%