Smart people. click here. i attached a pic of the problem

Simplify the expression. -2/5(10+15m-20n)

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

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)