Simplify. Express your answer with positive exponents. Assume that all variables are nonzero.(2x-9y6z-5)-2
A. 
B. 
C. 
D. 
Answer: A
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Evaluate the factorial expression.10!
A. 3,628,800 B. 362,880 C. 7,257,600 D. 1,814,400
Convert the Chinese numeral to Hindu-Arabic form.
A. 520 B. 620 C. 920 D. 820
Find the difference. Check by adding.75,729 - 362
A. 74,867 B. 75,017 C. 75,367 D. 76,091
Solve.Two resistors are wired in parallel, one of which is 80 ohms. If the total resistance is to be 60 ohms, what must be the value of the other resistor? Use the formula for the total resistance R in an electrical circuit with resistors R1, R2, R3, ..., Rn that are wired in parallel. src="https://sciemce.com/media/4/ppg__2720702191531__f1q105g5.jpg" style="vertical-align: -21.0px;" />
A. 34.3 ohms
B. 20 ohms
C. 240 ohms
D. 140 ohms
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