What is the solution of the system of equations? 72x−12y=92 3x−y=5 write answer as x, y

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.

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?

Janet is rolling a number cube with the numbers one through six she record the numbers after each row if she rolls of keep 48 times how many times should she expect to roll a 4