Which expression is quivalent to 3y- 2 + 2y +7 - y

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.

Molly shared a spool of ribbon with 12 people. each person received 3 feet of ribbon. which equation can she use to find r, the number of feet of ribbon that her spool originally had?

You dug a hole that was 8 feet deep. after taking a short break, you dug down 3 more feet in the same hole. when finished digging, a tractor accidentally filled the hole with 4 feet of dirt. how deep is your hole now?