Simplify the expression.5x + 7(x + 1) + 1
A. 12x + 6
B. 12x - 6
C. 12x + 8
D. -2x + 8
Answer: C
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Solve the system by using Gaussian elimination with backward substitution or by reducing the matrix to reduced-row echelon form. x- y+ 4z= -13x+ z= 0 x+ 2y+ z= 2
A. (0, 1, 0) B. No solution C. (0, 0, 1) D. (0, 1, -1)
Factor.7pq4 - 7pr4
A. 7p(q2 + r2)(q + r)(q - r) B. 7p(q2 + r2)(q2 - r2) C. (7pq2 + 7pr2)(7pq2 - 7pr2) D. (7pq2 + pr2)(pq2 - pr2)
Solve the linear programming problem.A candy company has 120 pounds of cashews and 155 pounds of peanuts which they combine into two different mixes. The deluxe mix has half cashews and half peanuts and sells for $7 per pound. The economy mix has one third cashews and two thirds peanuts and sells for $5.70 per pound. How many pounds of each mix should be prepared for maximum revenue?
A. 85 deluxe, 35 economy B. 170 deluxe, 105 economy C. 255 deluxe, 70 economy D. 120 deluxe, 0 economy
For the given functions, find the requested function or functional value.For f(x) = 
, g(x) = 
, and h(x) = 5x+ 20, find (f?g?h)(x).
A. 
+ 4
B. 
C. 
D. 5
+ 20