What expression is equivalent to 7 3/4+3 5/6-1 3/4

Which of the following is true for the relation f(x)=2x^2+1

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

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)