What is the sum of 2/5 and 2/5 in simplest form

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

Which ordered pair is a solution to the system of linear equations? 2x + 3y= 6 –3x + 5y = 10

Sarah used her calculator to find sin 125 degrees. she wrote down sin sin125 degrees.57. how could sarah recognize that her answer is incorrect?