Please help! refer to the picture!

Classify the following triangle check all that apply

Before simplifying, how many terms are there in the expression 2x - 5y + 3 + x?

Mrs. avila is buying a wallpaper border to go on all of her kitchen walls. she wants to buy 5 extra feet of wallpaper border than she needs to be sure she has enough. she buys 55.5 feet of the border. the store owner selling the border uses the width of mrs. avila's kitchen to determine that the length of her kitchen must be 14.5 feet.