Find the function value.f(x) = 15x - 1, find f(2)
A. 29
B. 1
C. -29
D. 30
Answer: A
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Data that show a constant percentage change can be modeled by an exponential function.
Answer the following statement true (T) or false (F)
Solve the problem. Round to the nearest tenth, if necessaryFind the percent if the part is 2.5 and the whole is 4.5.
A. 5.6% B. 55.6% C. 27.8% D. 180%
Suppose 100 people counted the number of cars passing an intersection in one hour. Due to error, not all people get the same value. The mean is 75 and the standard deviation is 1. Use the sketch to find how many people report the following. 
Between 74 and 76 cars
A. 50 people B. 34 people C. 84 people D. 68 people
Write a system of linear equations in three variables, and then use matrices to solve the system.There were approximately 100,000 vehicles sold at a particular dealership last year. The dealer tracks sales by age group for marketing purposes. The percentage of 36- to 59-year-old buyers and the percentage of buyers 60 and older combined exceeds the percentage of buyers 35 and younger by 38%. If the percentage of buyers in the oldest group is doubled, it is 24% less than the percentage of users in the middle group. Find the percentage of buyers in each of the three age groups.
A. 33% 35 and younger; 51% 36-59 year olds; 16% 60 and older B. 25% 35 and younger; 56% 36-59 year olds; 19% 60 and older C. 15% 35 and younger; 54% 36-59 year olds; 31% 60 and older D. 31% 35 and younger; 54% 36-59 year olds; 15% 60 and older