Find the composition. If f(x) = 2x + 2 and g(x) = x + 4, find (g ? f)(x).
A. 2x2 + 10x + 8
B. 2x + 10
C. 2x + 6
D. 2x2 + 10
Answer: C
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How much should a healthy Shetland pony weigh? Let x be the age of the pony (in months), and let y be the average weight of the pony (in kilograms). Suppose a random sample of ponies gave the following information.
x
4
7
14.00
19
21
y
50
85
130
160
175
Draw the line that best fits the data whose scatter diagram is given below.
A.
B.
C.
D.
E.
Solve the absolute value equation or indicate that the equation has no solution.
= 8
A. {-2, 2, -6} B. {-2, 2} C. {2, 6} D. {-2, 2, 6}
Factor the polynomial as the sum or difference of two cubes.x3 + 8
A. (x + 2)(x2 + 4) B. (x - 8)(x2 - 1) C. (x + 2)(x2 - 2x + 4) D. (x - 2)(x2 + 2x + 4)
Solve the equation. If the solutions involve square roots, give both the exact solutions and the approximate solutions to three decimal places.5k2 - 44k - 9 = 0
A. - 
, 9
B. -5, 9
C. - 
, 5
D. 
, - 