<u><em>The Average is about 15840 feet long.A child can run 10560 feet.</em></u>
<u><em>Good luck!</em></u>
4x + 8y = 20
- 4x + 2y = -30
find y first
in order to find y eliminate x
add the two equations together
4x+-4x+8y+2y= 20+-30
4x-4x+8y+2y= 20-30
10y= -10
divide both sides by 10 to get y by itself
10y/10= -10/10
y= -1
find x by using the substitution method
- 4x + 2y = -30
-4x+2(-1)=-30
-4x-2= -30
move -2 to the other side
sign changes from -2 to +2
-4x-2+2= -30+2
-4x= -28
divide both sides by -4
-4x/-4= -28/-4
x= 7
answer:
(7,-1)
Is this a multiple choice question? If so can you please give me the answer choices?
Answer:
Look below:
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Answer:
A
Step-by-step explanation:
multiple lines meeting at 90 degrees. hope this helped