Answer:
Robert Recorde. 
Step-by-step explanation:
Robert Recorde was a Welsh known for vast knowledge and experience in the field of mathematics and physics. He was born in Tenby, Pembrokeshire, Wales during the Medieval period (c. 1512). 
Robert Recorde was famously known for his work in the field of mathematics and most especially, the invention of the equal to (=) sign. He introduced it in his book titled "The Whetstone of Witte."
<em>Hence, Robert Recorde was the first english mathematician who first used the modern symbol of equality in 1557. </em>
 
        
             
        
        
        
I think what you are wanting id 0.1 is that rounded to one significant figure
        
                    
             
        
        
        
Answer & Step-by-step explanation:
n represents our number. So, twice a number would be 2n because twice means multiply by two.
When the problem says 6 less, then it means 6 less than 2n. So, it would look like 2n-6.
FInally, the problem says that all of this equals 17 so 17 would be the result. 
So, you answer is 2n-6 = 17. This is answer choice B.
 
        
             
        
        
        
Distance = Average speed * Time = 48*10 = 480 miles
So, they drove for 480 miles