Express the exercise as a system of linear equations, then find the solution. Use a calculator where appropriate.A college student earned $8400 during summer vacation working as a waiter in a popular restaurant. The student invested part of the money at 
and the rest at 
If the student received a total of $638 in interest at the end of the year, how much was invested at 
A. $1200
B. $4200
C. $5900
D. $2500
Answer: D
Mathematics
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Find the x- and y-intercepts for the equation. Then graph it.y + 
x = 4
A. (0, -8), (8, 0)
B. (0, 4), (-4, 0)
C. (0, 4), (-8, 0)
D. (0, 4), (8, 0)
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Find the area of the specified region.Inside the six-leaved rose r2 = 8 cos 3?
A. 4
B. 8
C. 16
D. 
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Find the product.
A. 
B. 
C. 
D. 
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Perform the indicated operation.- 
+ 
A. -5 B. 5 C. 7 D. -7
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