Answer:
M equals 9.3
Step-by-step explanation:
To get m alone add 4.2 to each side
 
        
             
        
        
        
Answer:
A) See the picture 
B) 14
C) 45%
 
Step-by-step explanation:
A) To create a histogram like the one on the picture you can use an online tool like socscistatistics where the number of classes is customizable
 
B) Because the question B and C have to be responded using a frequency table with 8 classes the answer is 14; the method of using cumulative frequency tables should only be considered as a way of estimation, that is because you obtain values that depend on your choice of class intervals. The way to get a better answer would be to use all the scores in the distribution
 
Pc1 = 100*(4/40) = 10
Pc2 = 100*(4/40) = 10
Pc3 = 100*(3/40) = 7.5
Pc4 = 100*(11/40) = 27.5
Pc5 = 100*(5/40) = 12.5
Pc6 = 100*(4/40) = 10
Pc7 = 100*(7/40) = 17.5
Pc8 = 100*(2/40) = 5
 
Pc8 + Pc7 + Pc6 + Pc5 + Pc4 + Pc3 + Pc2 = 90% 
 
Therefore, From class 8 to class 2 is the top 90% of the applicants and the minimum score is 14. 
 
C) Scores equal to or greater than 20 are from class 8 to class 5
 
Pc8 + Pc7 + Pc6 + Pc5 = 45%
 
        
             
        
        
        
It is like multiplying by 3 but all you are doing is doubling the numbers
hopefully you get this
        
                    
             
        
        
        
Answer:
y = 5x-2
Step-by-step explanation:
5x - y = 2
Subtract 5x from each side
5x - y -5x = 2 -5x
-y = -5x+2
Multiply each side by -1
y = 5x-2
 
        
                    
             
        
        
        
$5
The equation is true when we plug 5 in for x. So, x=5 and therefore Ron’s daily allowance is $5. 
7(5+5) = 70
7(10) = 70
70 = 70 ✔️
7(10+5) = 70
7(15) = 70
105 = 70 ❌
7(15+5) = 70
7(20) = 70
140 = 70 ❌
7(20+5) = 70
7(25) = 70
175 = 70 ❌