If 80 miles is 50% of his trip, then you know that 80 miles is only HALF of his entire trip. To get the distance Raul traveled in total, simply double the 80 miles. This would be 160 miles. 
Raul traveled a total of 160 miles in his trip.
        
             
        
        
        
X² - 7x + 10 = 0
Let's factor out the equation first.
x² - 7x + 10
x             -2
x             -5
This factoring of (x-2)(x-5) fit the equation.
(x-2)(x-5) = 0
One of the factors must equal 0 as to equal zero.
Either x - 2 = 0 or x - 5 = 0
x - 2 = 0 
x = 2
x - 5 = 0
x = 5
The two answers are x = 2 or x = 5. Hope this helps!
        
             
        
        
        
Answer: a= $24.99 
               b= $39.98
I hope this helps
Step-by-step explanation: