Factor by grouping.x2 + 6x + xy + 6y
A. (x + 6)(x - y)
B. (x - 6)(x - y)
C. (x - 6)(x + y)
D. (x + 6)(x + y)
Answer: D
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Simplify.(2xy)-5
A. 
B. 
C. 32x5y5
D. 
Consider the differential equation. A detailed direction field is not needed. Find the solutions that are constant, for all 
(the equilibrium solutions). In what regions are solutions increasing? Decreasing?y'(t) = (y - 2)(y + 6)
A. y = 2, y = -6; increasing for -6 < y < 2; decreasing for y < -6 or y > 2 B. y = -2, y = 6; increasing for -6 < y < 2; decreasing for y < -6 or y > 2 C. y = 2, y = -6; increasing for y < -6 or y > 2; decreasing for -6 < y < 2 D. y = -2, y = 6; increasing for y < -6 or y > 2; decreasing for -6 < y < 2
Find the standard deviation for each data set. Round to one more place than the data.17, 12, 10, 13, 5, 17, 7, 6, 9
A. 4.4 B. 4.2 C. 4.8 D. 1.3
Solve.The amount of water used to take a shower is directly proportional to the amount of time that the shower is in use. A shower lasting 17 minutes requires 8.5 gallons of water. Find the amount of water used in a shower lasting 5 minutes.
A. 1.7 gallons B. 2.5 gallons C. 28.9 gallons D. 10 gallons