What is (–5) 2 and how do i solve

Which letters from the table represent like terms? a and b b and c a and d b and d

Jimmy can run 3.5 miles in 20 minutes. how far can ne run in one hour and ten minutes?

Mallory has been offers two different jobs. she can baby sit for 6 hours a week and get $8.50 an hour. or she can work at the library for 14 hours a week and make $5.50 an hour. which job will allow her to save the most money after 6weeks?