The science club charges $6.50 per car at their car wash. How many cars do they have to wash to earn at least $500?

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

Can some one me with these questions

Tom is the deli manager at a grocery store. he needs to schedule employee to staff the deli department for no more that 260 person-hours per week. tom has one part-time employee who works 20 person-hours per week. each full-time employee works 40 person-hours per week. write and inequality to determine n, the number of full-time employees tom may schedule, so that his employees work on more than 260 person-hours per week. graph the solution set to this inequality.