Answer:
5 & 1
Step-by-step explanation:
We can use the quadratic formula to solve this:
Quadratic Formula = 
So we will have 2 answers (roots).
a is the coefficient of x^2 (2)
b is the coefficient of x (-12)
c is the constant (10)
Now, substituting, we get:
x = 
Hence the roots are 5 & 1
(30.26/35.6)*100= 85%
check: .85 * 35.6 = 30.26
Since we are asked for tge graph that represent the total cost for the x numbers of lesson, it will be helpful to illustrate it first this way
for each lesson it will cost $30 dollars
1 lesson $30
2 lessons $60
3 lessons $90
4 lessons $120
5 lessons $150
So from this set of numbers , it is apparent that the grqph in letter c represents the total costs for x numbers of lessonsseethati
10 × 75 = 750 minutes to file 100% of the files. (Approximately 12.5 hours)
= 0.7
70% of these files = 750 × 0.7 = 525 minutes.
Converting 525 minutes into hours, Jan would to take 8.75 hours to file 70% of the files.
