Find the value of y if 2y +4=8​

If g(x) is an odd function, which function must be an even function?

Me with this one question, and i'll upvote the brainliest answer

Part a: sam rented a boat at $225 for 2 days. if he rents the same boat for 5 days, he has to pay a total rent of $480. write an equation in the standard form to represent the total rent (y) that sam has to pay for renting the boat for x days. (4 points)