Aconstruction crew just finished building a road the crew worked for 4 1/3 days. if they built 2 1/7 kilometers of road each day what is the total length of road they built

What statement is true? 2x^2-9x+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.

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.