Solve the following system of equations by substitution -2x+y=1
-4x+y=-1

A. (3,1)
B.(-1,3)
C.(-1,-3)
D.(1,3)

slope= 1

y-inter slope= 0

x       y

o     0

1       1

2     2

ect.

step-by-step explanation:

can someone me: the midsegment through the legs of an isosceles triangle is 4 in. find the sides of the triangle if its perimeter is 20 in. ,   and point g is the centroid of the right △abc with hypotenuse ab=18 in. find cg.