Add or subtract as indicated.(5x2 - xy - y2) + (x2 + 11xy + 8y2)
A. 5x2 + 11xy + 8y2
B. 6x2 + 12xy + 9y2
C. 4x2 - 12xy - 9y2
D. 6x2 + 10xy + 7y2
Answer: D
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Make the following length or weight conversion between the U.S. and the metric system.237 miles to kilometers (Round to the nearest thousandth.)
A. 381.333 km B. 147.296 km C. 131.667 km D. 428.733 km
Solve the inequality, then graph the solution.a + 10 < -1 
A. (-?, -11]
B. [-11, ?)
C. (-?, -11)
D. (-11, ?)
Simplify. Assume that no denominator is zero and 00 is not considered.x8 ? x7
A. (2x)56 B. x15 C. (2x)15 D. x56
Solve.When making a telephone call using a calling card, a call lasting 6 minutes cost $1.10. A call lasting 15 minutes cost $2.00. 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 - 13
B. y = 0.1x + 0.5
C. y = 10x - 
D. y = -0.1x + 1.7