Find the equation of the line shown.
Pls helllppp

Find the sum of the following series. round to the nearest hundredth if necessary.

If the cost to mail a package is an initial $5 and $0.28 for every pound the total cost to mail a package was $11.27, how much did the package weigh?

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)