An important calculation in calculus is the evaluation of the expression 
, where h ? 0. Find 
.f(x) = 9x + 6
A. 9
B. 6
C. -9
D. -6 + 2h
Answer: A
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Solve the problem.College students can purchase points for use in the food service areas instead of cash. If you initially pay the basic food service fee of $45, then points can be purchased for 30 cents each; otherwise, points cost 60 cents each. How many points must you use in order for it to be cheaper to pay the basic food service fee?
A. 145 points B. 160 points C. 150 points D. 151 points
Solve using the quadratic formula. Use a calculator to approximate the solution to three decimal places.
x2 + 
= x
A. 3 ± 2.449 B. 3 + 2.449i C. -0.3 ± 2.449i D. 3 ± 2.449i
Add. Do not use a number line except as a check.25 + (-17) + (-13)
A. -5 B. 21 C. 29 D. 55
Find a general term an for the geometric sequence.a1 = - 
, r = -5
A. an = - 
? (-5)n-1
B. an = - 
- 
(n - 1)
C. an = 
n-1
+ 
D. an = - 
+ 
(n - 1)