Answer:

Step-by-step explanation:
Given


Required
Find S
Midpoint is calculated as:

So, we have:

<em>Where x2 and y2 are the coordinates of S</em>
Multiply through by 2



By comparison:




So:

Answer:
495 students are at Lincoln Middle School
Step-by-step explanation:
450/?
450 = 90%
450*90% = 450 * 0.90 = 405
450- 405 = 45
450+45 = 495
There is no upper limit so, so x is greater than or equal to 24 (x ≥ 24)
Answer:
65/100
Step-by-step explanation:
13/20 is equal to 65/100
The fraction would be 35/100, in simplest form that is 7/20.