50 points 7th grade math ! asap

1. sam solved the following problem:

-4x + 5 > 29
-4x + 5 - 5 > 29 - 5
-4x > -24
-4x/-4 > -24/-4
x > 6

what were his two mistakes? (3 points)

2. hillary buys 3 pounds of gala apples and some granny smith apples. both kinds of apples cost $4.50 per pound. the total cost is $24.75. how many pounds of granny smith apples did hillary buy? write and solve a variable equation. show your work.
(4 points)

3. tell whether each equation has one solution, infinitely many solutions, or no solution. (3 points)

6x + 8 = 6(x + 2)
10x = 15 + 5x
x + 11 = 8x + 11 - 7x

34 cup. a serving of vegetable soup is 23 cup. the restaurant sold 20 servings of chicken noodle soup and 18 servings of vegetable soup. how many more cups of chicken noodle soup did they sell than cups of vegetable soup?

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

Do social recommendations increase ad effectiveness? a study of online video viewers compared viewers who arrived at an advertising video for a particular brand by following a social media recommendation link to viewers who arrived at the same video by web browsing. data were collected on whether the viewer could correctly recall the brand being advertised after seeing the video. the results are given below.correctly recalled the brandarrival 409153browsing20484b. conduct the hypothesis test, using the 0.025 level of significance.what is the value of the test statistic? χ2stat=what is the p-value? p-value=is this value significant atα=0.025?