Copy the problems on paper, mark the givens, and fill in the blanks to complete the proofs of statements asked.

Given the following sampling distribution of one mean with a sample size 49, from a normally distributed population, find the population standard deviation, o.79828588912497

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

Segment an is an altitude of right δabc with a right angle at a. if ab = 2, squared 5 in and nc = 1 in, find bn, an, ac.