Solve the formula for the specified variable.d = rt for r
A. r = dt
B. r = 
C. r = 
D. r = d - t
Answer: C
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Solve the problem.A new car dealership sold 270 cars in 2010, and sales are increasing by about 58 cars per year. Let s be the number of cars sold in the year that is t years since 2010. Find an equation for a linear model to describe this situation. Then solve that equation for t.
A. t = 
B. t = 
C. t = 
D. t = 
Find the general term of the arithmetic sequence.-1, -3, -5, -7, -9, . . .
A. an = 2n - 1 B. an = 1 - 2n C. an = -1 - 2n D. an = -3 - 2n
Solve the problem.A church has 9 bells in its bell tower. Before each church service 5 bells are rung in sequence. No bell is rung more than once. How many sequences are there?
A. 126 B. 3024 C. 6048 D. 15,120
The double line graph below shows the number of Acme Superstores vs. the number of General Superstores. 
In what year was the number of Acme stores approximately equal to the number of General stores?
A. 2012 B. 2010 C. 2009 D. 2008