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
Mathematics
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