Add the fractions, and simplify the result to lowest terms. 2/3+ 2/7= ? question 3 options: a) 2 b) 20/21 c) 2/5 d) 4/21

Ateacher has $80 to buy workbooks. each work book cost $3. if she buys as many workbooks as possible, how much money does she have leftover? a) $2 b) $4 c) $6 d) $8

What expression is equivalent to 42x-56y

Tom drove 206 miles in 3.9 hours. estimate his average speed.