Select all the expressions that cannot be factored using intergal coefficients and intergal constants
a. x^2 + 5x + 3
b. 25 - 20x + 4x^2
c. -2x^2 + 7x - 3
d. 2x^2 - 5x + 4

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.