Solve the proportion. Write the solution in decimal form when applicable. = 

A. 21.7
B. 21
C. 68
D. 26


Answer: B

Mathematics

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Use properties of exponents to simplify the expression. Express answers in exponential form with positive exponents only. Assume that any variables in denominators are not equal to zero.-3

A.
B. x18
C.
D. x30

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Solve the system. If the system's equations are dependent or if there is no solution, state this.  x + y + z = 7  x - y + 2z = 72x + 3z = 15

A. (1, 2, 4) B. The equations are dependent. C. No solution D. (4, 2, 1)

Mathematics

Find the product or quotient, using trigonometric form. Write the answer in the form a + bi.

A.  + i
B.  - i
C. -  - i
D. -  - i

Mathematics

Solve the problem.Find cos , given that cos ? = -  and ? terminates in 90° < ? < 180°.

A. - 
B.
C.
D. - 

Mathematics