Solve the problem.Tom Quig traveled 290 miles east of St. Louis. For most of the trip he averaged 70 mph, but for one period of time he was slowed to 20 mph due to a major accident. If the total time of travel was 7 hours, how many miles did he drive at the reduced speed?
A. 100 miles
B. 90 miles
C. 75 miles
D. 80 miles
Answer: D
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Change the order of integration and evaluate the integral.
A. 
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B. 
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C. 
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D. 
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Solve the problem.The cost c, in dollars, associated with fixing a computer is estimated by the equation 
, where x is the number of hours required of a certified repairman and y is the number of hours required of a software specialist. Find the cost of a repair for which a certified repairman worked 3 hours and a software specialist worked 6 hours.
A. $255 B. $205 C. $178 D. $195
Multiply.(x + 4)(x2 - x + 8)
A. x3 + 3x2 + 32 B. x3 + 3x2 + 4x + 32 C. x3 + 32 D. x3 + 5x2 + 12x + 32
Write the phrase as a mathematical expression. Use x to represent the number. Combine like terms if possible.A number multiplied by -3, subtracted from the sum of 16 and eight times the number.
A. (16 + 8x) - (-3)x; 16 + 11x B. 3x - 24 C. (16 + 8x) + (-3)x; 16 + 5x D. 3x - (16 + 8x); -5x - 16