Solve the equation.140 = 10x + 10
A. 120
B. 13
C. 4
D. 124
Answer: B
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Solve the problem. Express your answer in simplest form.Alan walked 
mi to the store and then another 
mi to his friend's house. How far did he walk?
A. 
mi
B. 
mi
C. 
mi
D. 
mi
Solve the problem.A sports shop sold tennis rackets in 2 different weights, 3 types of string, and 4 grip sizes. How many different rackets could they sell?
A. 20 B. 9 C. 24 D. 12
Graph the function.f(x) = 
A. 
B. 
C. 
D. 
Solve the problem.The concentration C (arbitrary units) of a certain drug in a patient's bloodstream can be modeled using 
where t is the number of hours since a 500 milligram oral dose was administered. Using the TABLE feature of a graphing utility, find the time at which the concentration of the drug is greatest. Round to the nearest tenth of an hour.
A. 5.6 hours B. 7.9 hours C. 6.4 hours D. 7.1 hours