Solve.36x2 + 16y2 = 5764y + 6x = 24
A. (0, 4), (6, 0)
B. (0, -4), (0, -6)
C. (0, 6), (4,0)
D. (0, -6), (-4, 0)
Answer: C
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Solve the problem.Let u = 2i + 8j, v = 2i + 3j, and w = i - j. Write u = u1 + u2 where u1 is parallel to v and u2 is parallel to w.
A. u1 = 4v u2 = -24w B. u1 = 3v u2 = 2w C. u1 = 0.5000 v u2 = -0.5000w D. u1 = 2.000 v u2 = -2.000w
Find the product using the FOIL method.(x + 9y)(-4x - 6y)
A. x2 - 42xy - 54y2 B. -4x2 - 42xy - 42y2 C. x2 - 42xy - 42y2 D. -4x2 - 42xy - 54y2
Solve the problem.A power plant is located on a river that is 700 feet wide. To lay a new cable from the plant to a location in a city 1 mile downstream on the opposite side costs $175 per foot across the river and $150 per foot along the land. Suppose that the cable goes from the plant to a point Q on the opposite side that is x feet from the point P directly opposite the plant. Write a function C(x) that gives the cost of laying the cable in terms of the 
A. C(x) = 150
+ 175(5280 - x)
B. C(x) = 175(700 - x) + 150(1 - x)
C. C(x) = 175
+ 150(5280 - x)
D. C(x) = 175
+ 150(1 - x)
Use Gauss-Jordan elimination to find the solution. Write the solution as an ordered triple. x + y + z = 7 x - y + 2z = 75x + y + z = 11
A. (1, 2, 4) B. (4, 2, 1) C. (1, 4, 2) D. (4, 1, 2)