Find an equation of variation for the given situation.y varies jointly as x and w and inversely as z, and y = 
when x = 2, w = 5, and z = 20.
A. y = 
B. y = 
C. y = 28xwz
D. y = 
Answer: A
Mathematics
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Integrate the function.
A. 2
+ C
B. 2
+ C
C. 
+ C
D. 2 ln
+ C
Mathematics
Solve the equation.
- 
= -6
A. 19 B. -19 C. 17 D. -17
Mathematics
Find the exact value of the expression using a sum or difference identity.cos 255°
A. 
(
- 1)
B. - 
C. - 
(
- 1)
D. 
Mathematics
Use a graphing calculator to approximate the solutions of the system.
?
?
A. (2.9, 1) B. (-1.9, 4.9) C. (-1, -2.9) D. (1, 2.9) E. (3.9, -0.9)
Mathematics