Find the LCD for the rational expression.
, 
, 
A. 2(2x - 1)
B. 2(2x - 1)(2x + 6)
C. 2(2x - 1)(x + 3)
D. (2x - 1)(2x + 6)
Answer: C
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Solve the problem.The price of a printer was reduced from 
to $220. What was the percent of the decrease?
A. 50% B. 45% C. 81.8% D. 55%
Solve the problem.The level of a sound in decibels (db) is determined by the formula 
where I is the intensity of the sound in watts per square meter. What is the intensity of a noise measured at 53 db? Express the answer in scientific notation, rounded to two decimal places.
A. 2.00 × 10-7 watt/m2 B. 2.00 × 1014 watt/m2 C. 5.30 × 10-10 watt/m2 D. 2.00 × 10-6 watt/m2
Solve.
= 1 + 
A. 0, 81
B. 0, 121
C. 0, 169
D. 0, 
Factor completely. If the polynomial is prime, then state this as your answer.a2 + 12a + 32
A. (a - 4)(a + 8) B. (a - 4)(a + 1) C. (a + 4)(a + 8) D. prime