The solutions for 
is option 3. 
Step-by-step explanation:
Step 1:
First, we must bring the equation to the form of 
So becomes 
The value of a is the coefficient of the 
term, the value of b is the coefficient of x term and c is the coefficient of the constant term.
Comparing the above equation to 
we get 
and 
We have the formula 
Step 2:
By substituting the known values, we get
This is the third option.
Multiply the average by the number of exams to find total points:
8 x 55 = 440
9 x 60 = 540
The score of the 9th exam is the difference between the two totals:
540 - 440 = 100
They scored a 100
Answer:
240
Step-by-step explanation:
360-(60+60) = 240
4
5x - 4 = 16
Add four to both sides
5x = 20
Divide both sides by 5
x = 4
Answer:
2/5
8/20
4/10
16/40
Step-by-step explanation:
