Solve. Round to the nearest percent if necessary.Enrollment in a class at a local college increased from 80 to 120. What was the percent of increase?
A. 50%
B. 150%
C. 33%
D. 40%
Answer: A
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60 ? 30 ? 100
A. 63,000 B. 183,000 C. 177,000 D. 180,000
Provide an appropriate response.Suppose a machine will yield a net of $200 per month for 5 years, after which the machine would be worthless. How much should the firm pay for the machine if it wants to earn 5% annually on its investment and also set up a sinking fund to replace the purchase price? For the fund, assume monthly payments and a rate of 4% annually.
Fill in the blank(s) with the appropriate word(s).
Write the augmented matrix for the system. 6x + 9y + 7z = 26 9x + 6y + 2z = 7 7x - 2y + 4z = -3
A. 
B. 
C. 
D. 
Graph the set of numbers given in interval notation. Then write an inequality statement in x describing the numbers graphed.(4, ?)
A. x ? 4
B. x < 4
C. x > 4
D. x ? 4