Multiply.(7x - 4y2)2
A. 49x2 - 56xy2 + 16y4
B. 49x2 + 56xy2 + 16y4
C. 49x2 + 16y4
D. 49x2 - 16y4
Answer: A
Mathematics
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A. 8(a6 - 4a3b) B. 8(a3 - 2b)(a3 + 2b) C. a3(8a3 - 32b) D. 8a3(a3 - 4b)
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?Determine the open intervals on which the graph of 
is concave downward or concave upward.
A. ?concave upward on 
; concave downward on 
B. ?concave downward on 
C. ?concave upward on
D. ?concave downward on ; ?concave upward
E. ??concave upward on 
; concave downward on 
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Find the mean of the set of sample data. ? 58, 62, 90, 82, 76, 60, 90 ?
A. 76 B. 74 C. 32 D. 82 E. 90
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Find the midpoint between the two points.(2, -2) and (-9, 2)
A. (-7, 0)
B. (11, -4)
C. 
D. 
Mathematics