Answer:
 %
%
Step-by-step explanation:
Probability is found by first forming a fraction where the numerator represents the number of desired outcomes and the denominator represents the total number of outcomes.  In this case, the desired outcomes is the amount of times the coin lands on heads (9) and the total outcomes is the number of times the coin is tossed (20): 

Divide numerator by denominator to get a decimal: 9÷20= 0.45
Multiply the decimal by 100 to get a percent: 0.45 x 100 = 45%
 
        
             
        
        
        
Answer:
Some of the most lucrative jobs are all about math. Most engineering fields are all about sharp math skills, whether it’s civil and mechanical or software engineering. Working in finance also obviously involves a lot of math, and what better way to make money than working in the field that’s all about money? You can also become a statistician or actuary; it’s not easy to find good statisticians, despite the need for them. If you want to earn good money, then you do need good math skills.Then again, you could use math in life anyway.
Step-by-step explanation:
 
        
             
        
        
        
I cannot see a pictureesss
        
                    
             
        
        
        
80=6th graders 
40=5th graders
80+40=120
120/22= 60/11
120/25=24/5
120/30= 4 
There are 30 students in each class because he teaches 4 class and 120/30 will give you 4.
        
             
        
        
        
Answer:
lets just say the f stands for 1 and 1 times negative 4 is negative 4 
and 5 will stay 5 the equation would be -4/5 so after u divide the 4 and the five you get negative 1