Solve using the elimination method. Use a graphing calculator to check your answer.x + y = 4x - 2y = 21

A. (-6, 8)
B. (-6, -8)
C. (6, 8)
D. (6, -8)


Answer: D

Mathematics

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A. 23° B. 157° C. 67° D. 203°

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Collect like terms.6a - 2a + 4

A. -4a + 4 B. 8a C. 4a + 4 D. 8a + 4

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Write the function shown in the graph as a transformation of r(x) = .

A. y = 
B. y =  - 4
C. y = 
D. y =  - 4

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A rectangular box is resting on the xy-plane with one vertex at the origin. The opposite vertex lies in the plane . Find the dimensions that maximize the volume.

(Hint: Maximize  subject to the constraint ). ? A. 15 units × 12 units × 5 units B. 11 units × 9 units × 5 units C. 10 units × 9 units × 6 units D. 15 units × 10 units × 6 units E. 12 units × 11 units × 7 units

Mathematics