Factor when possible.375x3y - 192y4
A. (15xy - 12y2)(25x2 + 16y2)
B. 3y(5x - 4y)(25x2 + 20xy + 16y2)
C. 3y(5x + 4y2)(25x2 - 20xy + 16xy2)
D. 3y(125x - 4y)(x2 + 20xy + 16y2)
Answer: B
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Solve.The speed of a stream is 4 mph. If a boat travels 84 miles downstream in the same time that it takes to travel 42 miles upstream, what is the speed of the boat in still water?
A. 15 mph B. 14 mph C. 12 mph D. 8 mph
Write the whole number in expanded form.47,138
A. 40,000 + 7000 + 100 + 30 + 8 B. 80,000 + 3000 + 100 + 70 + 4 C. 4000 + 700 + 10 + 38 D. 47,138
Fill in the blank with one of the words or phrases listed below. 
A(n) 
is a shorthand notation for repeated multiplication of the same factor.
A. equation B. area C. expression D. exponent
Show that f and g are inverses of each other by verifying that f(g(x)) = x = g(f(x)).f(x) = 
; g(x) = 3 - x2
What will be an ideal response?