Find the sum, if it exists.-15 - - - - . . .

A.
B. - 5
C. - 20
D. Does not exist

Answer: C

Mathematics

Solve the problem.Joan can mow a 3-acre field in 4 hours. How long would it take her to mow a 2.6-acre field? Round to the nearest tenth.

A. 0.9 hr B. 6.5 hr C. 3.5 hr D. 5.5 hr

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Mathematics

Find the absolute value of the complex number.-5i

A. 25 B. -5 C. 5 D. 5i

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Mathematics

Determine the quadratic function whose graph is given.||

A. f(x) = -2x2 - 4x - 3 B. f(x) = 2x2 + 4x + 3 C. f(x) = 2x2 - 8x + 3 D. f(x) = -2x2 + 4x + 3

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Mathematics

Find the center (h, k) and radius r of the circle with the given equation. x2 + y2 - 8x + 16y = -71

A. (h, k) = (-4, 8); r = 9 B. (h, k) = (8, -4); r = 9 C. (h, k) = (-8, 4); r = 3 D. (h, k) = (4, -8); r = 3

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Mathematics