Solve the problem.Walt made an extra $7000 last year from a part-time job. He invested part of the money at 9% and the rest at 10%. He made a total of $660 in interest. How much was invested at 10%?
A. $3000
B. $3500
C. $5000
D. $4000
Answer: A
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Match the equation with the surface it defines.
+ 
= 
A. Figure 2 B. Figure 4 C. Figure 1 D. Figure 3
Perform the indicated operation. Assume that all variables are nonnegative.(2
+ 2)(4
+ 7)
A. 36
B. 70 + 22
C. 22
+ 14
D. 14 + 8
+ 14
The augmented matrix of a system of equations has been transformed to an equivalent matrix in row-echelon form. If the system is consistent, then give the solution. If it is not, then state that it is inconsistent.
A. (58, -20, 5) B. (58, -22, 5) C. (63, -22, 5) D. Inconsistent
Determine the domains of f and g.
?
?
A. Domain of f: all real numbers x except 
Domain of g: all real numbers x except x = 0
B. Domain of f: all real numbers x except
Domain of g: all real numbers x except x = 0
C. Domain of f: all real numbers x except x = 0
Domain of g: all real numbers x
D. Domain of f: all real numbers x except
Domain of g: all real numbers x
E. Domain of f: all real numbers x
Domain of g: all real numbers x