Answer:
47 I believe
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
228 feet
Step-by-step explanation:
Since M represents the number of lessons he completes,
sub M=8 into S=26M+20
S=26(8)+20
=228
 
        
             
        
        
        
We can put this information into two equations:
7 booklets = 140 stamps
3 booklets = 60 stamps
Let us then focus on one equation to find the relationship:
7 booklets = 140 stamps
If we put that into a fraction, we get 

 or 

.
This means that for every booklet, Ashley gets 20 stamps; or rather, each booklet has 20 stamps.
We can then see that this relationship holds true for the second equation as well:

 or 

.
To write a general equation for this relationship using 
p for the number of postage stamps, and 
b for the number of booklets:
p = 20b
Where 
b is equal to 
p.
 
        
        
        
Answer:
f(-1) = 15
General Formulas and Concepts:
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
<u>Algebra I</u>
- Functions
- Function Notation
Step-by-step explanation:
<u>Step 1: Define</u>
<em>Identify</em>
f(x) = 5(2 - x)
<u>Step 2: Evaluate</u>
- Substitute in <em>x</em> [Function f(x)]:                                                                           f(-1) = 5(2 - -1)
- (Parenthesis) Subtract:                                                                                     f(-1) = 5(3)
- Multiply:                                                                                                             f(-1) = 15