Solve using the elimination method. Use a graphing calculator to check your answer.
x + 
y = 4
x - 2y = 21
A. (-6, 8)
B. (-6, -8)
C. (6, 8)
D. (6, -8)
Answer: D
Mathematics
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Solve the problem.Two angles of a triangle are 48° and 109°. Find the third angle.
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
Mathematics
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