What is the value of (3 1/2 - 9 3/4) ÷ (-2.5)
a. -2.5
b. -2.3
c. 2.3
d. 2.5
and it would be if you guys could also explain how.

Which of the following is true for the relation f(x)=2x^2+1

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.

How many ordered pairs of positive integers satisfy xy=32?