Determine whether the given function is one-to-one. If it is one-to-one, find a formula for the inverse.f(x) = (x - 3)3
A. f-1(x) = -3 - 
B. Not one-to-one
C. f-1(x) = 
- 3
D. f-1(x) = 
+ 3
Answer: D
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Solve the system by addition. 8x + 6y = -36-6x + 3y = -18
A. ? B. {(0, -5)} C. {(-1, -5)} D. {(0, -6)}
Solve the application and answer with a complete sentence.Pete studied 18
hours for his history test. Mike studied 4
hours for the same test. How much longer did Pete study than Mike?
A. Pete studied 13
hours more than Mike.
B. Pete studied 13
hours more than Mike.
C. Pete studied 13
hours more than Mike.
D. Pete studied 14
hours more than Mike.
Solve the equation. Round your answer to the nearest tenth. 2x + 
= 
A. -0.3 B. -1.2 C. -1.9 D. -1.5
Use the graph to answer the question. 
What were the total sales for the first 6 months of 2006?
A. $366,000 B. $240,000 C. $46,000 D. $290,000