Multiply the top equation by 6 and the bottom equation by 7. You will cancel x first by doing this and solve for y. You should get y=-1.
Substitute in y for either original equation.
You should get x=1.
Solution is (1,-1).
The expression - x - 9x^2 + 12x^2 + 7 has 4 terms:
-x, -9x^2, 12x^2, 7
Like terms are:
-9x^2, 12x^2
For this function we can find y-intercept.
x=0, y=-2
This graph is on the top, right.
27.99x.075= 2.09925 or 2.10 Rounded
27.99+2.10= $30.09
