Question 955641
Hello! Let's see if I can help.
1) *[illustration ITSASCREENSHOT]

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2) When you solve systems using graphs, you graph them and then find where they intersect. So:
*[illustration ITSAGRAPH]
The solution is (7,2), or x = 7 and y = 2, because that's where the two lines intersect.

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3)-4+y=16
3x+15y=114
First let's see what y is in the first equation. Basically, solve for y.
y=20
Now plug in 20 into y in the second equation.
3x+15(20)=114
Now solve for x.
3x+300=114
3x=-186
x=-62
So x=-62 and y = 20. The ordered pair is (-62,20).

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4)*[illustration hehehe]

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5)*[illustration Screen_Shot_2015_04_19_at_11.04.14_AM.png]
The solution is (-1,1), or x = -1, y = 1, because that's where the two lines intersect.

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I hope I helped!