Factor by grouping.20x6 + 16x3y4 - 15x3y4 - 12y8
A. (4x3 - 3y)(5x3 + 4y8)
B. (20x3 - 3y4)(x3 + 4y4)
C. (4x3 + 3y4)(5x3 - 4y4)
D. (4x3 - 3y4)(5x3 + 4y4)
Answer: D
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Solve.The average monthly low temperatures for a small town are listed in the table.
The function f(x) = 22.5 sin 
+ 40.7 models this data, where x = 1 corresponds to January 1, x = 2 to February 1, and so on. Approximate when the average low temperature equals 35 °F.
A. March 1 and November 1 B. March 16 and October 16 C. March 5 and October 5 D. April 16 and November 16
Clear fractions then solve by substitution.x + 
y = y - 3
x - y = 3x - y
A. {(1, 6)} B. {(0, 6)} C. {(3, 0)} D. ?
Find the mode or modes for the set of numbers.106, 141, 156, 106, 188, 199, 162
A. 156 B. 141 C. 106 D. 85
Find the given power. Write the answer in standard form.(1 + i)20
A. -1024i B. 1024 C. -1024 D. 1024i