Solve using subsistution -x + 2y = 6
1 answer:
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Answer:
20
Step-by-step explanation:
Therefore, the remaining student scored a 20 (which sounds weird, but I'm going with it).
9514 1404 393
Answer:
B
Step-by-step explanation:
Sam wants the magnitude of the difference from 78 ounces to be less than 2.5 ounces. He can find the limits by setting that magnitude to 2.5.
See the attached figure.
Water model ⇒⇒⇒ y = -0.3 x² + 3x ( blue graph )
Light model ⇒⇒⇒ -2x + 5.5 y = 19.5 ( red graph )
The intersection between the two models A and B
A = ( 1.657 , 4.148 )
B = ( 7.13 , 6.138 )
<span>B is at a higher level than point A
</span>
<span>The distance from the ground level to point A = y-coordinate of point A
= 4.148
</span>
Water model ⇒⇒⇒ y = -0.3 x² + 3x ( blue graph )
Light model ⇒⇒⇒ -2x + 5.5 y = 19.5 ( red graph )
The intersection between the two models A and B
A = ( 1.657 , 4.148 )
B = ( 7.13 , 6.138 )
<span>B is at a higher level than point A
</span>
<span>The distance from the ground level to point A = y-coordinate of point A
= 4.148
</span>