Factor the expression completely.15x2 - 65x - 50
A. (15x + 10)(x - 5)
B. (3x + 2)(5x - 25)
C. 5(3x + 2)(x - 5)
D. 5(3x - 2)(x + 5)
Answer: C
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Solve the problem using determinants.Linear systems occur in the design of roof trusses for new homes and buildings. The simplest type of roof truss is a triangle. The truss shown in the figure is used to frame roofs of small buildings. If a 128-pound force is applied at the peak of the truss, then the forces or weights W1 and W2 exerted parallel to each rafter of the truss are determined by the following linear system of equations. 
W1 + 
W2 = 256
-4.0px;" />W1 - 
W2 = 0Find W1 and W2.
A. W1 = 93.7 lb; W2= 114.76 lb
B. W1 = 114.76 lb; W2= 93.7 lb
C. W1 = 128 lb; W2= 156.77 lb
D. W1 = 46.85 lb; W2= 57.38 lb
Divide by using long division.
A. 434 B. 316 C. 316 R364 D. 316 R434
Use the graph of a quadratic function to find the solution set of the equation or inequality. For a solution set that involves an interval, use interval notation.-x2 - 1x - 4 ? 0
A. x = 4 B. (-?, 4) ? (4, ?) C. (-?, ?) D. ?
Convert the units using two or three unit fractions.10 gal = 
c
A. 80 B. 40 C. 160 D. 20