Solve the problem.The variable z varies jointly as the third power of x and the second power of y. When 
and 
Approximate the constant of variation to three significant digits.
A. 3.23
B. 6.63
C. 4.73
D. 3.63
Answer: D
Mathematics
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Find the exact value of x.cos-1 x = csc-1 
A. 
B. 
C. 
D. 
Mathematics
Solve the equation and check your solution.-6.4 + x = 20
A. x = 25.9 B. x = 13.1 C. x = 13.6 D. x = 26.4
Mathematics
Identify the property that allows you to conclude that the triangles are congruent. Or, if such a conclusion cannot be made, answer "None."
A. ASA B. SSS C. SAS D. None
Mathematics
Find z1z2. Express the answer in standard form.z1 = 4(cos 120° + i sin 120°)z2 = 5(cos 120° + i sin 120°)
A. 10
- 10i
B. -10
+ 10i
C. 10 + 10i
D. -10 - 10i
Mathematics