4x+10-4(-4x+5) some one help I’m a freshmen

Precalculus question, image attached.

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)

Julie was able to walk 16 km through the zoo in 6 hours. how long will it take her to walk 24 km through the zoo?