I need help on #3

if anyone could help me that would be cool!

Which letters from the table represent like terms? a and b b and c a and d b and d

Amajor grocery store chain is trying to cut down on waste. currently, they get peaches from two different distributors, whole fruits and green grocer. out of a two large shipments, the manager randomly selects items from both suppliers and counts the number of items that are not sell-able due to bruising, disease or other problems. she then makes a confidence interval. is there a significant difference in the quality of the peaches between the two distributors? 95% ci for pw-pg: (0.064, 0.156)

Find the value of x. also give me an explanation so i can complete it to other questions as well, : )