Study the following expression: 3a²b + 4a²b-6ab+9
1.2.1 How many terms are there in the expression?
1.2.2 Write down the coefficient of b.
1.2.3 Write down the constant term.​

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.