Solve the following systems of equations:
- 7x + y = 4
8x - 3y = 1
X=
y =

x=-1 y=-3

( − 1 , − 3 ) or x= − 1 , y = − 3

Step-by-step explanation:

Solve for the first variable in one of the equations, then substitute the result into the other equation.

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6