Add or subtract as indicated. Simplify the result whenever possible. Write any answer that contains an improper fraction as a mixed number. 
+ 
A. 
B. 
C. 
D. 1
Answer: D
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Decide whether or not the set of ordered pairs defines a function.{(-3, -3), (-1, 5), (4, -7), (5, 3)}
A. No B. Yes
Solve.The population of a particular city is increasing at a rate proportional to its size. It follows the function P(t) = 1 + ke0.07t where k is a constant and t is the time in years. If the current population is 16,000, in how many years is the population expected to be 40,000? (Round to the nearest year.)
A. 7 yr B. 13 yr C. 6 yr D. 81 yr
Find the linear function that is the best fit for the given data. Round decimal values to the nearest hundredth, if necessary.
A. y = -1.86x + 1.79 B. y = 1.79x + 0.43 C. y = 0.43x + 1.79 D. y = 1.79x - 1.86
Factor by grouping.10x2 + 15x + 8x + 12
A. (5x - 4)(2x - 3) B. (10x + 4)(x + 3) C. (10x - 4)(x - 3) D. (5x + 4)(2x + 3)