Solve the problem.Nine times a number, added to 45, is 126. Find the number.

A. 81
B. 9
C. -9
D. 729


Answer: B

Mathematics

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Decide whether or not the given equation is an identity.cos  = 

A. Yes B. No

Mathematics

Solve the system by substitution.  2u + v = 24u - 3v = -6

A. = - , v = 2
B. = 0, v = 2
C. = 2, v = 0
D. = 2, v = - 

Mathematics

Use the given vectors to find the indicated expression.v = -2i - 2j - 4k,  w = 5i + 4j + 2kFind v × (2w).

A. 28i - 36j + 12k B. 8i - 12j - 6k C. 24i - 32j + 4k D. -24i + 12j - 4k

Mathematics

Select the correct graph, showing f and g are inverse functions. ? ?

A.
B.
C.
D.
E.

Mathematics