Use a coterminal angle to find the exact value of the expression. Do not use a calculator.sec 390°

A.
B.
C.
D.

Answer: D

Mathematics

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Multiply the pair of monomials.

A. a27
B. a12
C. - a27
D. - a12

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Mathematics

Solve the system using Gaussian elimination.  5x - 7y + 7z =  -86-25x + 35y - 35z =  430 15x - 21y + 21z = -258

A. {(x, y, z) 5x - 7y + 7z = -86}
B. {(-6, 2, -6)}
C. {(x, y, z) 15x - 21y + 21z = -86}
D. ?

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Mathematics

Rationalize the denominator.

A.
B.
C.
D.

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Mathematics

Points A and B have coordinates (-3, 5) and (4,-3).

(a) Plot A and B on the grid.
(b) Find AB.
(c) Find the midpoint of AB.

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Mathematics