Simplify by first converting to rational exponents. Assume that all variables represent positive real numbers.
A. 
B. 
C. 6x6.5
D. 
Answer: A
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Write the equation for the plane.The plane through the point A(-7, -10, 8) perpendicular to the vector from the origin to A.
A. 7x - 10y - 8z = 9
B. 7x + 10y - 8z = 
C. -7x - 10y + 8z = -213
D. 7x + 10y - 8z = -213
A student deposits $140 each month in a Holiday Club account at her bank. The account pays no interest. Write an equation that expresses the amount in her account in terms of the number of deposits. ?
A. 
B. 
C. 
D. 
E. none of these
Solve.Amy can clean the house in 8 hours. When she works together with Tom, the job takes 6 hours. How long would it take Tom, working by himself, to clean the house?
A. 2 hr
B. 25 hr
C. 24
hr
D. 24 hr
Subtract.(5r2 + 4r + 6) - (8r2 + 9)
A. -3r2 + 4r - 3 B. 13r2 - 5r + 6 C. -3r2 - 5r + 6 D. 13r2 + 4r + 15