Which answer expresses 6y: 8y in its simplest form

The mathematical expression 9€ t means

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.

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