Problem 1: According to the website lendingtree.com, the average debt is $5700 per household in America. The mayor of a small town is wondering if the average debt for people in his town is lower than the national average. He surveyed an SRS of 28 households and found that the average debt is $5437 with a standard deviation of $2014. The data does not show any strong outliers or skewness. a) Do we have some evidence to suggest that the average debt for people in this town is lower than the national average? Explain. b) Perform a hypothesis test at a significance level, alpha = 0.10.

In step 1, I don't understand how b is an element of only H and not k. Please let me know. Thank you

For each of the following problems, which subtraction model take away, missing addend, comparison, or measurement corresponds best to that problem? (a) Ivan solved 18 problems and Andreas solved 13 problems. How many more problems has Ivan solved than Andreas? (b) On Malea's 12-mile hike to Mirror Lake, she came to a sign that said she had 5 miles left to reach the lake. How far has Malea walked so far   2.) In an attempt to do a three-digit subtraction, Yuan writes                                                                             706                                                                            -327                                                                             421 (a) Identify what she is doing incorrectly.  (b) How will you help correct her error

Step 3 We already have a leading 1 in row 2, column 2. To get a zero in row 1, column 2 we can add -1 times row 2 to row 1 and put the result in row 1. To get a zero in row 3, column 2 we can add 2 times row 2 to row 3 and put the result in row 3. 1 1 10 0 1 0-1 9. 1 20 1 -5 0 1 2 -5 *-2 11 0 -4 0 0 Submit Skip (you cannot come back)