Solve the problem.Find the number of units that must be produced and sold in order to yield the maximum profit, given the following equations for revenue and cost:R
= 4xC
= 0.01x2 + 1.4x + 20.
A. 540 units
B. 260 units
C. 270 units
D. 130 units
Answer: D
Mathematics
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Solve the problem.Let u = 6i + j, v = i + j, and w = i - j. Find scalars a and b such that u = av + bw.
A. 6v + w B. 6v - w C. 3.500 v + 2.500w D. 0.2857 v + 0.4000 w
Mathematics
Solve the system of equations.x2 + y2 = 21y2 = 2x + 13
A. (2, 
), (-3, 
), (2, -
), (-3, -
)
B. (3, 
), (-4, 
), (3, -
), (-4, -
)
C. (2, 
), (-4, 
), (2, -
), (-4, -
)
D. (2, 3
), (-4, 3
), (2, -3
), (-4, -3
)
Mathematics
Add or subtract as indicated. Express the answer in feet and inches.11 ft 4 in. - 3 ft 2 in.
A. 14 ft 2 in. B. 8 ft 2 in. C. 7 ft 2 in. D. 8 ft 4 in.
Mathematics
Write the statement using symbols.The difference 35 less 7 equals 28.
A. 35 - 7 = 28
B. 
= 5
C. 35 ? 7 = 245
D. 35 + 7 = 42
Mathematics