Simplify.-7(5r + 5) + 10(7r + 2)
A. -2r - 2
B. 35r + 5
C. -70r
D. 35r - 15
Answer: D
Mathematics
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A. 31.2 B. 80 C. 31.1 D. 8 E. none of the above
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Provide an appropriate response.Using a calculator, find the value of cos 195°. Round to four significant digits.
A. 0.9756 B. -0.9756 C. -0.9659 D. 0.9659
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Expand the expression using the Binomial Theorem.(x - 4)5
A. x5 - 20x4 + 160x3 - 640x2 + 1,280x - 4 B. x5 - 20x4 + 320x3 - 1,280x2 + 1,280x - 4 C. x5 - 20x4 + 320x3 - 1,280x2 + 1,280x - 1,024 D. x5 - 20x4 + 160x3 - 640x2 + 1,280x - 1,024
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Find n for the given value of an in the arithmetic sequence.an = 1640; 1, 2, 3, . . .
A. n = 3280 B. n = 40 C. n = 39 D. n = 820
Mathematics