Solve the problem.A wire 20 feet long is to be cut into two pieces. One piece will be shaped as a square and the other piece will be shaped as an equilateral triangle. Express the total area A enclosed by the pieces of wire as a function of the length x of a side of the equilateral triangle. What is the domain of A?
What will be an ideal response?
A(x) = 
x2 - 
x + 25; {x|0 ? x ? 
}
Mathematics
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Solve the problem.Peter must practice the piano 13
hours per week. He has already practiced 7
hours. How many more hours does he need to practice?
A. 4
hours
B. 5 hours
C. 6
hours
D. 5
hours
Mathematics
Use the given graph of f(x) = ax2 + bx + c to solve the specified inequality.f(x) < 0
A. -3 < x < 3 B. x < -3 C. x < -3 or x > 3 D. no solution
Mathematics
Solve the problem.The manager of a candy shop sells chocolate covered peanuts for $5 per pound and chocolate covered cashews for $12 per pound. The manager wishes to mix 30 pounds of the cashews to get a 
mixture that will sell for $8 per pound. How many pounds of peanuts should be used?
A. 70 lb B. 20 lb C. 35 lb D. 40 lb
Mathematics
Simplify.
A. 
B. 
C. 
D. 
Mathematics