Find the maximum or minimum value of the given objective function of a linear programming problem. The figure illustrates the graph of feasible points. 
z = -x - 9y. Find maximum.
A. maximum: -22
B. maximum: -38
C. maximum: -47
D. maximum: -30
Answer: A
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Determine whether the equation is linear. If it is linear, give values for a and b so that the equation can be written in the form ax + b = 0.5(x - 4) = 0
A. Yes; a = 5, b = -20 B. Yes; a = -20, b = 5 C. No D. Yes; a = 5, b = -4
Factor the polynomial.t3 + 125
A. (t - 125)(t2 - 1) B. (t + 5)(t2 + 25) C. (t + 5)(t2 - 5t + 25) D. (t - 5)(t2 + 5t + 25)
Find the extreme values of the function subject to the given constraint.
A. Maximum: 8 at 
minimum: -31 at 
B. Maximum: 4 at 
minimum: -4 at 
C. Maximum: 8 at 
minimum: -4 at 
D. Maximum: 4 at 
minimum: -31 at 
Provide an appropriate response.Which of the following expressions is equivalent to cos src="https://sciemce.com/media/4/ppg__10625191757__f1q76g7.jpg" alt="" style="vertical-align: -4.0px;" />IV. -cos 
? I. cos 
II. cos 
III. cos
A. I and IV
B. I and II
C. I and III
D. III and IV