Use the elimination method to solve the system.
A. x = 12, y = -12
B. x = -4, y = 5
C. x = 5, y = -5
D. x = -5, y = 5
Answer: C
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Find the area of the surface generated by revolving the curve about the indicated axis. y = x3/9, 0 ? x ? 2; x-axis
A. 98?
B. 
?
C. 
?
D. 
?
Decide whether the composite functions, f ? g and g ? f, are equal to x.f(x) = 
, g(x) = 2x - 5
A. Yes, yes B. No, yes C. No, no D. Yes, no
Solve.The population of a particular city is increasing at a rate proportional to its size. It follows the function P(t) = 1 + ke0.08t, where k is a constant and t is the time in years. If the current population is 47,000, in how many years is the population expected to be 117,500? (Round to the nearest year.)
A. 5 yr B. 6 yr C. 85 yr D. 11 yr
Solve the system of equations by elimination.3x - 5y = -126x + 8y = -24
A. (4, 0) B. (-4, 0) C. (0, -4) D. (0, 4)