Use a graphing calculator to find the inverse of the matrix.
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A. 
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B. 
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C. 
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D. 
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E. 
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Answer: B
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Solve the problem.Find the number of units that must be produced and sold in order to yield the maximum profit, given the following equations for revenue and cost:R(x) = 50x - 0.5x2C(x) = 10x + 3.
A. 43 units B. 40 units C. 60 units D. 41 units
Solve by using the multiplication property of equality.-9b = 117
A. {-126} B. {1} C. {-13} D. {126}
Solve.When making a telephone call using a calling card, a call lasting 6 minutes cost $0.95. A call lasting 16 minutes cost $1.95. Let y be the cost of making a call lasting x minutes using a calling card. Write a linear equation that relates the cost of a making a call, y, to the time x.
A. y = 0.1x - 14.05
B. y = 10x - 
C. y = 0.1x + 0.35
D. y = -0.1x + 1.55
Solve.
A homeowner wants to know how much grass seed to buy. First the size of the yard must be determined. Use the drawing to determine how many square feet are in the yard.
A. 5,145 sq ft B. 3,695 sq ft C. 8,840 sq ft D. 4,430 sq ft