Answer i need .. 1. solve. x-2/5 = 1/5 a. 1/3 b. 1/2 c. 2 d. 3 2. what is the ratio of a to b. 1/2 = a+b/a-b a. -3 b. -1/2 c. -1/3 d. 3 3. samir paid $15.50 in shipping charges on a package that weighed 20 pounds. if shipping costs a certain set amount per pound, what shipping changes would samir pay on a 50-pound package? a. samir will pay $6.20 in shipping costs. b. samir will pay $21.70 in shipping costs. c. samir will pay $38.75 in shipping costs. d. samir will pay $45.50 in shipping costs.