Solve the problem.The perimeter of a rectangular room is 42 ft. The width is 7 ft. Find the length.

A. 15 ft
B. 13 ft
C. 14 ft
D. 35 ft

Answer: C

Mathematics

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Evaluate the determinant.

A. - 13 B. 0 C. 13 D. 5

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Mathematics

Use the graph to obtain the graph of the reciprocal function. Give the equation of the function for the graph that you obtain.y = - 3 cos x

A. y = 3 sec x

B. y = - 3 sin x

C. y = - 3 sec x

D. y = - 3 csc x

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Mathematics

Translate the sentence into an equation and solve it.If four more than a number is equal to fifteen, what is the number?

A. 4 + n = 15, n = -11 B. n = 15 + 4, n = 19 C. n + 4 = 15, n = 11 D. 4 - n = 15, n = -11

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Mathematics

Simplify by factoring.

A. x9
B. x8
C. x7
D. x8

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Mathematics