Lucy’s employer pays 70% of the total cost of her family’s health insurance plan, while Lucy pays the rest. If the total cost of the plan will increase from $450 per month to $650 per month, how much more will Lucy have to pay each month?

Students are given 3 minutes for each multiple-choice question and 5 minutes for each free-response question on a test. there are 15 questions on the test, and students are given 51 minutes to take it. how many multiple-choice questions are on the test?

Each cookie sells for $0.50 sam spent $90 on baking supplies and each cookie cost $0.25 to make how many cookies does sam need to sell before making a profit formula: sales> cost

What percent of 18 is 24? and plz explain thx.