Explain how to perform a two-sample z-test for the difference between two population means using independent samples with sigma 1 and sigma 2 known.

Need on this geometry question. explain how you did it.

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

Ab and bc are tangent to circle d. find x is ab = 3x + 8 and bc = 26. find x