Please help 20 points asap

Add 1/7 + -1/7 your answer should be reduced to its smallest form and should not be an improper fraction

Find the value of the cosine for angle a

Michelle had a birthday party. she bought a bag of candy with 96 starbursts, 72 hershey's, and 68 reese's. she wants to use all the candy she bought to make goody bags with the same amount of starbursts, hershey's and reese's in each bag. what is the largest number of bags she can make?