Solve the problem.Express the indicated sum as a fraction of whole numbers in lowest terms.
+ 
+ 
+ ... + 
A. 
B. 
C. 
D. 
Answer: A
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Solve the problem. Round your answer, if appropriate.Boyle's law states that if the temperature of a gas remains constant, then PV = c, where 
, 
, and c is a constant. Given a quantity of gas at constant temperature, if V is decreasing at a rate of 10 in. 3/sec, at what rate is P increasing when P = 20 lb/in.2 and V = 70 in.3? (Do not round your answer.)
A. 
lb/in.2 per sec
B. 
lb/in.2 per sec
C. 140 lb/in.2 per sec
D. 35 lb/in.2 per sec
Factor completely. If the polynomial is prime, state so.81y2 - 18xy +x2
A. (x - 9y)(x + 9y) B. (x + 9y)2 C. prime D. (x - 9y)2
Find the center (h, k) and radius r of the circle with the given equation. x2 + y2 = 16
A. (h, k) = (4, 4); r = 16 B. (h, k) = (0, 0); r = 4 C. (h, k) = (4, 4); r = 4 D. (h, k) = (0, 0); r = 16
Solve the equation by factoring.2x2 - 7x - 4 = 0
A. x = 
or x = - 2
B. x = - 
or x = 2
C. x = - 
or x = 4
D. x = -2 or x = 4