Solve the system by the substitution method.
A. (7, -5), (-7, 5)
B. (7, 5), (-7, -5)
C. (7, -5)
D. (7, -5), (-7, -5)
Answer: A
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A. 164 B. 162 C. 166 D. 82
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Solve the problem.Find the average rate of change.
Number of Years of Use
A. -$2.00 per year B. $2.00 per year C. $1.00 per year D. -$1.00 per year
Solve.A rectangular box with volume 468 cubic feet is built with a square base and top. The cost is $1.50 per square foot for the top and the bottom and $2.00 per square foot for the sides. Let x represent the length of a side of the base in feet. Express the cost of the box as a function of x and then graph this function. From the graph find the value of x, to the nearest hundredth of a foot, which will minimize the cost of the box.
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