calculate the variance and standard deviation for the following sample: 15,15,22,45,10,30. Round your answer to the nearest tenth.​

Two angles are complementary. the large angle is 36 more than the smaller angle. what is the measure of the large angle?

If you are trying to move an attached term across the equal sign (=), what operation would you use to move it?

Select the correct answer from each drop-down menu. a system of equations and its solution are given below. system a complete the sentences to explain what steps were followed to obtain the system of equations below. system b to get system b, the equation in system a was replaced by the sum of that equation and times the equation. the solution to system b the same as the solution to system a.]