Simplify the expression. Express the answer so that all exponents are positive. Whenever an exponent is 0 or negative, we assume that the base is not 0.(x-8y6)-8z6
A. 
B. 
C. 
D. 
Answer: A
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Solve the problem.Find the Celsius temperature when the Fahrenheit temperature is 104° F.
A. 
°C
B. 
°C
C. 40 °C
D. 72 °C
Use the partial sum formula to find the partial sum of the given arithmetic sequence.Find the sum of the first 40 terms of the arithmetic sequence: -10, -6, -2, 2, . . . .
A. 2652 B. 2450 C. 2720 D. 2800
Solve the problem.Sue drove her car 275 miles in January, 328 miles in February, and 253 miles in March. If her average mileage for the four months from January to April is to be at least 292 miles, how many miles must she drive in April?
A. at most 292 miles B. at most 312 miles C. at least 312 miles D. at least 287 miles
Solve the problem.Find k if x = 1 is a solution of the equation kx2 + x + 4 = 0.
A. k = 3 B. k = 5 C. k = -3 D. k = -5