Solve the problem.Suppose that the labor cost for a building is approximated by 
where x is the number of days of skilled labor and y is the number of days of semiskilled labor required. Find the x and y that minimize cost C.
A. x = 30, y = 36
B. x = 70, y = 24
C. x = 35, y = 12
D. x = 12, y = 30
Answer: C
Mathematics
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Solve the problem.Tracy wants to save $40,000 for a down payment towards a house. She puts $26 every month in an annuity that has a 5% annual interest rate. How long will it take her to save for the down payment? Round your answer to the nearest month.
A. 482 months B. 479 months C. 490 months D. 484 months
Mathematics
Add or subtract the rational expressions. Reduce to simplest terms.
+ 
A. 2
B. 
C. 
D. 
Mathematics
Multiply.0(7)(a ? 6)
A. 0 B. a C. 42a D. 6a
Mathematics
Use an integer to express the number.A football team gained 2 yards on one play.
A. 2 B. -2
Mathematics