The coefficient of x² is is a negative 0.6, so this function has a maximum value.
the max value of a quadratic function is the value of f(x) when x=-b/2a,
in this case, a=-0.6, b=382
so x=382/1.2=
r(382/1.2)=-0.6(382/1.2)²+382*(382/1.2)
use a calculator: 60801.67 is the number I got.
The bottom one is the answer
Answer:
The total cost of adding wallpaper to the room is 487.20
I don't know about how to put that in standard form, but an equation has to have an equals sign... So, that would be an equation.