Solve the radical equation. Check all proposed solutions.
- 
= 6
A. x = 9
B. x = -9
C. x = 10
D. no solution
Answer: A
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Find a formula for the function graphed.
A. f(x) = 
B. f(x) = 
C. f(x) = 
D. f(x) = 
Solve the quadratic equation by factoring.
- 
x + 1 = 0
A. 
B. {12, 10}
C. {-1, 0}
D. {11, 11}
Use the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 to find how many numbers can be formed. The first digit may not be 0.Form a 4-digit even number. Digits may be repeated.
A. 4050 B. 6480 C. 4500 D. 5040
Solve the problem.In September 1998 the population of the country of West Goma in millions was modeled by 
At the same time the population of East Goma in millions was modeled by 
In both formulas x is the year, where 
corresponds to September 1998. Assuming these trends continue, estimate what the population will be when the populations are equal.
A. 1 million B. 17 million C. 16 million D. 18 million