Susie bought a pair of jeans and a sweatshirt. the jeans cost $22.50 and the sweatshirt was on sale for $16.95. if the sales tax rate where susie lives is 7%, how much tax did she pay on her purchase?

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.

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?

John used linear combination to solve the system of equations shown. he did so by multiplying the first equation by -3 and the second equation by another number to eliminate the x-terms. what number did jonas multiply the second equation by? 4x-6y=23x+5y=11