Add.
+ 
A. 
B. x - 3
C. x + 5
D. x - 5
Answer: D
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Simplify.
- 
A. 
B. 
C. 
D. 
Solve each system of equations using matrices (row operations). If the system has no solution, say that it is inconsistent.x - y + 2z + w = 4y + z = 5z - w = 1
A. {(6 - 4w, 4 - w, 1 + w, w)} B. {(6, 4, 1, w)} C. ? D. {(2, 3, 2, 1)}
Solve the problem.A college student earned $6500 during summer vacation working as a waiter in a popular restaurant. The student invested part of the money at 
and the rest at 
If he received a total of $569 in interest at the end of the year, how much did he invest at 
A. $2700 B. $3250 C. $3800 D. $928
Use the indicated property to write an algebraic expression equivalent to the given expression.8(7n + 4); distributive
A. 56n + 4 B. 56n + 32 C. 88n D. 15n + 12