koalarules6 koalarules6

29-11-2016
Mathematics

contestada

guys i need help with substitution . the equation is 2x+6y=-110 . x= 8y. the answer has to be in coordinates. show your work.

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apologiabiology apologiabiology

29-11-2016

easwey

x=8y
sub 8y for x

2(8y)+6y=-110
16y+6y=-110
22y=-110
diivide both sides by 22
y=-5

sub back
x=8y
x=8(-5)
x=-40

x=-40
y=-5

(x,y)
(-40,-5)

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