PL HELPPP>> Show work solve the sysytem- y=1/2x^2+4x+4 y=-4x+12 1/2

The solution is (-17,80.5) and (1,8.5)

Step-by-step explanation:

Equation 1 :

Equation 2:

Substitute the value of y from equation 2 in equation 1

Equation 1 :

After substitution :

Substitute the value of x = -17

y = -4x+12.5

y = -4(-17)+12.5

y=80.5

Substitute the value of x = 1

y = -4(1)+12.5

y=8.5

Hence the solution is (-17,80.5) and (1,8.5)

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