Multiply the expression by its conjugate and simplify.
A. 
B. 
C. 
D. 1
E. 0
Answer: A
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Solve the problem. Round to the nearest dollar.A construction company purchased a piece of equipment for $1,610. The expected life is 9,000 hours, after which it will have a salvage value of $290. Find the amount of depreciation for the first year if the piece of equipment was used for 1,700 hours. Use the units-of-production method of depreciation.
A. $177 B. $149 C. $255 D. $304
If a and b are rational numbers, with a ? 0 and b ? 0, and if m and n are integers, determine if the following is true or false. Justify your answer.(a - b)m = am - bm
A. True; (2 - 1)1 = 21 - 11 B. False; (2 - 1)2 ? 22 - 12
Simplify.8 × 3 + {12 ÷ [8 - (3 + 2)]}
A. 28 B. 27 C. 30 D. 29
Write the decimal as a fraction. Do not simplify.10.55
A. 
B. 
C. 
D. 