A square has sides length s. When one side is increased by 2 inches and the other is decreased by 2 inches, the resulting rectangle has an area of 60 square inches. What was the original s=?

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.

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

Which of the following correctly justifies statement four of the two column proof? a. corresponding angles theorem b. transitive property of equality c. vertical angle theorem d. substitution property of equality