Since
- - -
In the first quadrant, cosine is positive, so
and in turn,
- - -
In the previous problem, we had
A right rectangular prism is filled to capacity with 152 cubes, each with 12 -inch long edges. What is the volume of the prism?
2 answers:
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Since
- - -
In the first quadrant, cosine is positive, so
and in turn,
- - -
In the previous problem, we had
Answer:
B) (-2, 5)
Step-by-step explanation:
Perhaps easiest is to try the points to see what works. You can also graph the equations or solve by any of several other means.
<u>Trying the points</u>
A) 3(-2)+4(-2) = -6 -8 = -14 ≠ 14
B) 3(-2) +4(5) = -6 +20 = 14; -2 = 2(5) -12 = 10 -12 . . . . true
C) 3(-4) +4(4) = -12 +16 = 4 ≠ 14
D) 3(2) +4(2) = 6 +8 = 14; 2(2) -12 = -8 ≠ -2
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Choice B ( -2, 5) is the only point that works in both equations.
