Solve the system of equations by susituition. What is the solutions for x? 2x + y = 1
4x + 2y = -1

A: x = 0
B: x = 2
C: There is no x value, as there is no solution.
D: x can be any value, as there is an infinite number of solutions.

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3

b. x- 48 =120

step-by-step explanation:

answer: 0.64

step-by-step explanation: