Multiply. Simplify by combining like terms.(a + 6b)(a + 10b)

A. b2 + 13ab + 60a2
B. 1 + 16ab + 16b2
C. a2 + 16ab + 60b2
D. a2 + 16a + 60b2

Answer: C

Mathematics

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A.  ×  × .

B.  ×  × .

C.  ×  × .

D.  × .
E. none of these

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A. 625 B. -125 C. -625 D. 125

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Evaluate the expression

(a) 13 (b) -15 (c) 0 (d) 15 (e) - 13

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Find the integral.

A. -  cot 5x + C
B.   cot 5x + C
C. -  tan 5x + C
D. - 30 cot 5x + C

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Mathematics