What is the measurements for these angles on is 2x+9 The other is 3x+1

Ihave this math question 2/3 ÷2 1/10=

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.

[15 points, algebra 2]simplify the complex fraction and find the restrictions.