What is the unit rate if 23 and 6

Which expression is equivalent to (9x - 3 1/ + 1 3/8)

Describe in detail how you would construct a 95% confidence interval for a set of 30 data points whose mean is 20 and population standard deviation is 3. be sure to show that you know the formula and how to plug into it. also, clearly state the margin of error.

How do you determine whether a relationship represented as as graph is linear or nonlinear