Use cross multiplication to determine whether the pair of fractions is equivalent.
A. 0.324 = 0.324; Yes
B. 0.324 ? 0.405; No
C. 0.405 = 0.405; Yes
D. 0.27 ? 0.486; No
Answer: B
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Use an associative property to complete the statement.4y + (5x + 3) = 
A. (4y + 5x) + 3 B. (4y + 3) + 5x C. 7x + 32 D. (12y + 5x) + 3
Express in terms of sums and differences of logarithms.log9
A. log97 ? 
log9x ÷ log9y
B. log9(7
) - log9y
C. log97 + 
log9x - log9y
D. log9y - log97 - 
log9x
Solve the problem.The time T necessary to make an enlargement of a photo negative varies directly as the area A of the enlargement. If 140 seconds are required to make a 5-by-4 enlargement, find the time required for a 
enlargement.
A. 270 sec B. 210 sec C. 240 sec D. 180 sec
The function Y2 is defined as Y1 + k for some real number k. Based upon the given information about Y1 and Y2, find k.
A. -4 B. 4 C. -5 D. 5