Find a numerical expression for the phrase and evaluate it.The product of -3 and 1 added to the product of -5 and -9
A. -48
B. 42
C. 48
D. -138
Answer: B
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Find all the first order partial derivatives for the following function.f(x, y, z) = e(sin (x) + yz)
A. 
= e(sin (x) + yz); 
= ze(sin (x) + yz); 
= ye(sin (x) + yz)
B. 
= cos(x)e(sin (x) + yz); 
= e(sin (x) + yz); 
= e(sin (x) + yz)
C. 
= 
e(sin (x) + yz); 
= ze(sin (x) + yz); 
= ye(sin (x) + yz)
D. 
= cos(x) e(sin (x) + yz); 
= ze(sin (x) + yz); 
= ye(sin (x) + yz)
Add or subtract. Assume all variables represent positive real numbers.17
- 5
A. 8
B. -8
C. 17
- 5
D. 12
Data are given for y as a power function of x. Write an equation for the power function, and state its power and constant of variation. 
A. y = 
; Power = 
; constant of variation = 1
B. y = 0.5x ; Power = 1; constant of variation = 0.5
C. y = 2
; Power = -3; constant of variation = 2
D. y = 2
; Power = 
; constant of variation = 2
Factor.64s5 - 9st4
A. 64s(s2 + t2)(s + t)(s - t) B. (8s2 + 3st2)(8s2 - 3st2) C. s(8s2 + 3t2)(8s2 - 3t2) D. s(8s2 + 3t2)(s + t)(s - t)