Simplify the radical.
A. 6xy
B. 6xy
C. 6xy
D. 5xy
Answer: C
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Solve the problem.Yvette has up to $5000 to invest and has chosen to put her money into telecommunications and pharmaceuticals. The telecommunications investment is to be no more than 5 times the pharmaceuticals investment. Write a system of inequalities to describe the situation. Let 
to be invested in telecommunications and 
to be invested in pharmaceuticals.
A. x + y = 5000 x ? 5y x ? 0 y ? 0 B. x + y = 5000 y ? 5x x ? 0 y ? 0 C. x + y ? 5000 5x ? y x ? 0 y ? 0 D. x + y ? 5000 x ? 5y x ? 0 y ? 0
Use the substitution method to solve the system.2x + 8y = 4 x = -4y - 2
A. No solution B. (2, 4) C. Infinitely many solutions D. (4, 2)
Parametrize the surface S.S is the portion of the plane -7x - 7y + 7z = -2 that lies within the cylinder 
.
What will be an ideal response?
Solve the system by the substitution method.
A. {(4, -1), (2, -7)} B. {(-1, 4), (-3, 6)} C. {(-1, 4), (-7, 2)} D. {(4, -1), (6, -3)}