3/4=0.75
0.75×500=375
375 of the 500 seats are filled
3(b+6) = 3*b + 3*6 = 3b + 18
It takes them 1 7/8 hrs to complete the job together.
How:
Fred = 3 hrs
Jason = 5 hrs
1/3x + 1/5x = 1/x
3x x 5x = 15 —> 3x/15 + 5x/15 = 15/15
3x + 5x = 8x —> 8x/15 = 1.875 = 1 7/8 hrs
27 = 2x + 3
- 3 - 3
--------------------
24 = 2x
------ ------
2 2
12 = x or x = 12
12, 13, 15, 17, 17, 20 are the numbers in order
The median (middle number) would be 15 and 17
If there are 2 medians, you need to add both of them and divide by 2
15 + 17 = 32
32/2 = 16
So the median is 16
