Answer:
The combined average is 94%
Step-by-step explanation:
for first period, number of students =40
average =96%
for second period, no of students =20
average =90%
but
let
=sum of students for the first period
=sum of students for the second period
for first period;


for second period,


therefore the combined average = 
that is

so combined average is 94%
Answer:
It is a vertical line
Step-by-step explanation:
Find the slope using rise over run (y2 - y1) / (x2 - x1)
Plug in the points:
(y2 - y1) / (x2 - x1)
(1 - 9) / (-7 + 7)
-8/0
= undefined
Dividing by 0 gives you an undefined number. This means that the slope is undefined, and the line is a vertical line.
Answer:
1.575
Step-by-step explanation:
Answer:
5
Step-by-step explanation:
edu 2020
Answer:
6 1/5
Step-by-step explanation: