Help Algebra Nation Multiple choice Try your best OR I WILL REPORT

There is an entrance to the computer room at point e which lies on ab and is 5 feet from point a. plot point e on the coordinate plane. find the distance from the entrance at point e to the printer at point e

Prove sin2a + cos2a - 1 / sin2a + cos2a + 1 = 1 - tana / 1 + cota

Compute the standard deviation of the following set of data to the nearest whole number. 10, 10, 15, 20, 25