Solve the system using the inverse of the coefficient matrix of the equivalent matrix equation.-5x + 3y = 82x - 4y = -20

A. (2, 6)
B. (-6, -2)
C. (-2, -6)
D. (6, 2)

Answer: A

Mathematics

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A. x = -3 B. y = 4 C. y = -3 D. x = 4

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Solve the problem.Use the chart below to determine how many times brighter Star C is than Star D. (Round to the nearest whole number.)

A. Star C is 8 times brighter than Star D. B. Star C is 9 times brighter than Star D. C. Star C is 178 times brighter than Star D. D. Star C is 63 times brighter than Star D.

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Write as the sum and/or difference of logarithms. Express powers as factors. log7

A. log₇r ? log₇s ÷ 2log₇u
B. 2log₇r + 5log₇s - 2log₇u
C. log₇r + log₇s - log₇u
D. log₇r + log₇s - 2log₇u

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Mathematics

Combine. Simplify the answer. + +

A.
B.
C.
D.

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Mathematics