Determine whether (f ? g)(x) = x and whether (g ? f)(x) = x.f(x) = x3 + 8, g(x) = 
A. Yes, no
B. No, no
C. Yes, yes
D. No, yes
Answer: C
Mathematics
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Solve. If needed, round money amounts to two decimal places and all other amounts to one decimal place.The radiator in a certain make of car needs to contain 
of 40% antifreeze. The radiator now contains 
of 20% antifreeze. How many liters of this solution must be drained and replaced with 100% antifreeze to get the desired strength?
A. 20 L B. 25 L C. 12.5 L D. 16.7 L
Mathematics
Solve.log (5x + 5) = 2
A. 
B. 19
C. - 
D. - 19
Mathematics
Find the value of the determinant.
A. 34 B. -1 C. -31 D. 1
Mathematics
Determine whether a linear model, a quadratic model, or neither type of model would be reasonable for modeling the data depicted by the scattergram.
A. Linear B. Quadratic C. Neither
Mathematics