Solve using the elimination method. Use a graphing calculator to check your answer.
x + 
y = 4
x - 2y = 21
A. (6, -8)
B. (6, 8)
C. (-6, -8)
D. (-6, 8)
Answer: A
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Simplify. Assume that all variables represent positive real numbers.
- 
A. - 
B. 
C. 
D. 0
Solve the problem.Zach is planning to invest up to $40,000 in corporate and municipal bonds. The least he will invest in corporate bonds is $7000 and he does not want to invest more than $28,000 in corporate bonds. He also does not want to invest more than $25,053 in municipal bonds. The interest is 8.5% on corporate bonds and 6.1% on municipal bonds. This is simple interest for one year. What is the maximum income?
A. $15,112 B. $3112 C. $17,648 D. $31,112
Decide whether or not the function is continuous in the indicated x-interval.2 to 4
A. Not continuous B. Continuous
Graph the function.y = 9
- 8
A. 
B. 
C. 
D. 