1.
Checking the numbers that are greater than 10 in this set, we have:
11.2 and 12
2.
The numbers in this set that are lesser than or equal 9 are:
0, 4.5, 5 and 9
3.
Solving the inequality, we have:

Three values greater than 7 are:
8, 9, 10
4.
Solving the inequality, we have:

Three values smaller than 5 are:
4, 3, 2
5.
Solving the inequality, we have:

Three values greater than or equal 10 are:
10, 11, 12
X = number of sweaters
175 - 55 > 12X
120 > 12X
10 > X
the most amount of sweaters he can buy is 10
If 6people are in a row
flute players will be 2x6= 12
trombone players will be 8
12+8= 20 people altogether
4 miles = 1 day
4miles divided by 1/3 distance on 2nd day = 1.33 miles ran on second day
4/1 x 1/3=4/3 4 divided by 3= 1.33 miles ran on the second day
If Will ran 1/3 of the distance that he ran on the first day (4 miles) the second day, he ran 1.33 miles