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azamat
3 years ago
11

Solve the system by substitution. y=−3x-2 -7x+3y=10 PLEASE HELP

Mathematics
1 answer:
enyata [817]3 years ago
7 0
Y=-3x-2
subsitute -3x-2 for y
-7x+3(-3x-2)=10
distribute
a(b+c)=ab+ac
3(-3x-2)=-9x-6

-7x-9x-6=10
add like terms
-16x-6=10
add 6
-16x=16
multiply -1
16x=-16
divide 16
x=-1

subsitute
y=-3x-2
y=-3(-1)-2
y=3-2
y=1



x=-1
y=1

(x,y)
(-1,1)
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Step-by-step explanation:

The equation can be..

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Answer:

A

Step-by-step explanation:

We see that triangle QRS is located in Quadrant III. (See attachment for labelling of quadrants)

Reflecting it over the x-axis means that we flip it over the x-axis, or we flip it vertically. Doing so, QRS will end up in Quadrant II.

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3 years ago
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