Find all values of c such that 5c - 4 = 7 - 4-c/3

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.

What is the anwers for 9+2x=5x-3-x

Which expression is rational? 6. , square root two, square root 14, square root 49