Answer:
I)

II)

III)

Step-by-step explanation:
We are given the three equations:

I)
We want to find:

Substitute:

Rewrite:

And combine like terms. Hence:

II)
We want to find:

Likewise, substitute:

Distribute:

Rewrite:

And combine like terms. Hence:

III)
We want to find:

Substitute:

Distribute:

Rewrite:

And combine like terms. Hence:

I believe she walks 4 miles.
Answer:
A. (4,1)
Step-by-step explanation:
2x -5y = 3
x -3y = 1
Change the equation to isolate a variable so you can substitute it in the other one.
x = 1+3y so
2(1+3y) -5y = 3
2 + 6y -5y =3
2 + y = 3
y=1
Back to the easy equation we isolated
x = 1+3(1)
x= 4
(4,1) is a point where x=4 and y=1
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13
5.0
(9 votes)
Answer: 125
Step-by-step explanation:

sorry I don't think your really in grade school cause that's so not grade school that's like high school but now I know that I need to go back to like kg