Practice
simplify each expression by combining like terms.
1. 6x + 4x
2. – 5y + 2y
3.-3m - 8(m + 1)
4.-8(r - 2) + 6(r - 2)
5.9m - 7m + 13

plz someone me

(least common multiples) the answer that i had in the 1st step was lcm of airline tickets sold=72. idk if that even matters but just in case. ! three co-workers are busy selling airline tickets over the phone. in an 8-hour day, charles can sell 8 airline tickets, ann can sell 9 airline tickets, and michelle can sell 6 airline tickets. step 2 of 2: what is the smallest number of 8-hour days needed for each of them to achieve the same number of sales? it takes charles . it takes . it takes .

A. 90 degrees b. 45 degrees c. 30 degrees d. 120 degrees

Points a, b, and c form a triangle. complete the statements to prove that the sum of the interior angles of triangle abc is 180