Answer:
part a: 52%
part b: 0.4
part c: 0.24
Step-by-step explanation:
For part one, you find the frequency of the number of people that are less that 20. You add the number of tics in each bar and you divide by the total.
so for part a it is (7+6+9+4)/ (7+6+9+4+4+12+8) 
for part b you add up the values that are greater than 25(less than 35)
(12+8)/total
part c you find the number of people between 25 and 30
that's 12
over total
12/total
 
        
             
        
        
        
Answer:
-5
Step-by-step explanation:
f(-2) means that -2 is going to be our input in this function. 
To solve this, simply substitute -2 for x in the expression given. 
If f(x) = 3x+1, then f(-2) = 3(-2) + 1
3(-2)+1 = -6+1 = -5
Hope this helped!
 
        
                    
             
        
        
        
Answer:
<em>Correct answer:</em>
<em>A. I and II</em>
<em></em>
Step-by-step explanation:
First of all, let us have a look at the steps of finding inverse of a function.
1. Replace y with x and x with y.
2. Solve for y.
3. Replace y with 
Given that:

Now, let us find inverse of each option one by one.
I. y = x, a(x) = x
Replacing y with and x with y:
x = y
x =  =
 =  Hence, I is true.
  Hence, I is true.
II. 
Replacing y with and x with y:

 
 
 
 
 =
 =  Hence, II is true.
  Hence, II is true.
III. 
Replacing y with and x with y:
 
 
  Hence, III is not true.
IV. 
Replacing y with and x with y:
![x =y^{3}\\\Rightarrow y = \sqrt[3] x\\\Rightarrow a^{-1}(x) = \sqrt[3]{x} \ne a(x)](https://tex.z-dn.net/?f=x%20%3Dy%5E%7B3%7D%5C%5C%5CRightarrow%20y%20%3D%20%5Csqrt%5B3%5D%20x%5C%5C%5CRightarrow%20a%5E%7B-1%7D%28x%29%20%3D%20%5Csqrt%5B3%5D%7Bx%7D%20%5Cne%20a%28x%29) 
 
Hence, IV is not true.
<em>Correct answer:</em>
<em>A. I and II</em>
<em></em>
 
        
             
        
        
        
Answer:
Unlike terms 
Step-by-step explanation:
If it was 4y and 5y it would be like. Adding the x though makes them unlike terms, you cannot combine them