Answer:
Explanation:
<u>1. Calculate the average speed of train B</u>
- 60mph = 3/4 (s) ⇒ s = 60 (4/3) mph = 80 mph
<u>2. Build a table</u>
When the two trains meet:
Train     Average speed     Distance       time (distance/average speed)
                  mph                            
A                 60                             x                        x/60
B                 80                        240 - x                (240 - x) / 80
<u>3. Write the equation</u>
The time, when the two trains meet, is the same for both trains:
                   
<u>4. Calculate the time:</u>
- x/60 = 102.86 / 60 = 1.7 hours
The two trains will meet after 1.7 hours 
 
        
             
        
        
        
B=5a-4 
pick any a valve and replace it with a you will get b
        
             
        
        
        
Answer:
x=y[base side of isosceles triangle]
x²+y²=19²
x=√{19²/2)}
x=13.44
y=13.44
 
        
             
        
        
        
Answer:
first figure out what v is then add it with 2 then compare
Step-by-step explanation:
 
        
             
        
        
        
Answer:

Step-by-step explanation:
we know that
The simple interest formula is equal to
 
where
A is the Final Investment Value
P is the Principal amount of money to be invested
r is the rate of interest  
t is Number of Time Periods
in this problem we have
 
The inequality that represented this situation is

substitute the values and solve for t


![t \leq [(7,020/4,500)-1]/0.03](https://tex.z-dn.net/?f=t%20%5Cleq%20%5B%287%2C020%2F4%2C500%29-1%5D%2F0.03)
