100 + x-4 +3x =180
x = 21
hope it help
Answer: A proper subset is one that contains few elements of the original set whereas an improper subset, contains every element of the original set along with the null set.
I’m 15 so the answer is number 1
3 < = w + 2 < = 7.....subtract 2 from all parts
3 - 2 < = w + 2 - 2 < = 7 - 2....simplify
1 < = w < = 5 .....this is ur answer
12 < (14 + 17 + a) / 3 < = 16....multiply all parts by 3
12 * 3 < 3 *(14 + 17 + a) / 3 < = 16 * 3...simplify
36 < 14 + 17 + a < = 48
36 < 31 + a < = 48...subtract 31
36 - 31 < 31 - 31 + a < = 48 - 31
5 < a < = 17 <==== ur answer
