Associative Property
The parentheses are grouping operators.
Think about the word associate to make it easier
C. The vertexes are the same. The functions' vertex (h,k) values were not altered, just a (stretch/compress).
10 students of Elena's classmates like to make jewellery.
<u>Step-by-step explanation:</u>
Let total no.of classmates who liked the jewellery = x
Here, in the given problem, given she asked her classmates '20'. So, it clearly shows that total number of students/classmates = 20. Also, in that, 50% said like to make jewellery. Now find 'x' as below,



Hence, the total number of classmates who liked to make Jewellery = 10
The water tower is 62.8 meters tall :))