Idk because u dont say how much each think cost.
        
             
        
        
        
Answer:

General Formulas and Concepts:
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
<u>Algebra I</u>
- Slope Formula:  
Step-by-step explanation:
<u>Step 1: Define</u>
Point (1, -3)
Point (0, -1)
<u>Step 2: Find slope </u><em><u>m</u></em>
Substitute in points into the slope formula to find rate of change
- Substitute [SF]:                     
- Add/Subtract:                       
- Divide:                                  
 
        
             
        
        
        
The best way to multiply complicated problems mentally* is to break them into chunks.
Start with 20 times 8 to get 160, and then 8 times 5 to get 40. Add these together to get 200. 200 times 3 is 600, and 20 times 200 is 4000. Add these together to get your final answer, 4600. 
In other words 8 x 20 + 8 x 5 = 200  200 x 3 + 200 x 20 = 4600
*I assumed you meant mentally, because otherwise you'd just multiply longhand, multiplying two of the three numbers and then multiplying their product with the third. 
        
             
        
        
        
Answer:
the faster cyclist was going 18 mph 
the slower cyclist was going 9 mph
Step-by-step explanation:
72 ÷ 4 = 18
18 ÷ 2 = 9
 
        
                    
             
        
        
        
P divided by 31 is less than to 30 because what p is will be less because when you divide you make something smaller