What is the perimeter of triangle abc ? 12 units 13 units 14 units 18 units

Atheater wants to build movable steps that they can use to go on and off the stage. they want the steps to have enough space inside so they can also be used to store props. how much space is inside the steps?

Joe has some money in his bank account he deposits 45$ write an expression that represents the amount of money in joe's account

Having a hard time understanding this question (see attachment).