Question

Solve the system of equations.

y = -0.04x2 + 8.3x
y = 1.12x + 1.6
A. no solution
B. (0.22, 1.85)
C. (179.28, 202.39)
D. (0.22, 1.85) and (179.28, 202.39)

Answer 1

y=-0.08+8.3 x
Subtr. y= 1.6 +1.12x
0=-1.68+7.18x
7.18x=1.68

x=1.68/7.18=0.23
y=1.6+(1.12*0.23)=1.85
x=0.23 and y=1.85

Answer 2

The correct solution is D.

Answer 3

The first equation in the question is this?\[y=-0.04x ^{2}+8.3x\]