Y + 2/5y is equivalent to what?

Katlyn made 4 dresses with 7 yards of fabric. how many yards did she use on 1 dress?

Omar is going on a road trip! the car rental company offers him two types of cars. each car has a fixed price, but he also needs to consider the cost of fuel. the first car costs $90 to rent, and because of its fuel consumption rate, there's an additional cost of s0.50 per kilometer driven.

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