one number is 8 times a first number. a third number is 100 more than the first number. if the sum of the three numbers is 480, find the numbers

Find the area of a trapezoid with a height of 23, base 1 of 10 and base 2 of 18

Alex took his brother to a birthday party. the party was scheduled to last for 1 and 3/4 hours but they stayed for 4/5 of an hour more. how long did she stay at the party?

Simplify the expression 8h - 57-3m by adding or subtracting the like term