Answer:
21
Step-by-step explanation:
To find the mean, add up all the numbers
15+15+25+29 =84
Divide by the number of numbers
84/4 = 21
10 people because all the sisters have the same brother so 7+1+2.
17.01
05.00
02.00
03.00
+____
27.01
07.00
-____
20.01
100.00
-____
79.99
7x . h . 2xm
You can put together 6x and x
but since h, and 2xm arent alike terms, you cant combine
