PLEASE I NEED HELP WITH THE MATH HOMEWORK. I NEED EXPLANATION TOO!! QUESTION: find the value of the varible

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

Aquadrilateral has exactly one pair of parallel sides. which name best describes the figure?

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)