Answer:
How many miles does he ride his bike there and back? 
6 miles.
What information is extra?
The hour at which he leaves his house.
Step-by-step explanation:
We know that he rides 3 miles each way.
Then he rides 3 miles from his house to his friend's house, and another 3 miles from his friend's house to his house.
So he rides 3 miles both times, if we add that, we get:
3 miles + 3 miles = 6 miles
So:
How many miles does he ride his bike there and back? 
6 miles.
And to answer the other question, we need to look at the given information that we did not use in this calculation. In this case, is the hour at which he leaves his house.
Notice that we never did use the fact that he leaves his house at 4 p.m.
Then:
What information is extra?
The hour at which he leaves his house.
 
        
             
        
        
        
<h2>Hello There today we will solve your problem</h2>
<em>Response-</em>
<em>ABC is absolutely a right triangle</em>
<em>we can use the pythagorean theorem to solve this</em>
<h3><em>Definitions</em></h3>
Right Triangle - <em>A right triangle or right-angled triangle, or more formally an orthogonal triangle, is a triangle in which one angle is a right angle. The relation between the sides and other angles of the right triangle is the basis for trigonometry. The side opposite to the right angle is called the hypotenuse.</em>
Pythagorean Theorem - <em>In mathematics, the Pythagorean theorem, or Pythagoras' theorem, is a fundamental relation in Euclidean geometry among the three sides of a right triangle. It states that the area of the square whose side is the hypotenuse is equal to the sum of the areas of the squares on the other two sides.</em>
<em>_________________</em>
<em>To use to the Pythagorean Theorem it is</em>

For our equation  would be
 would be  
  would be
 would be 
<em>_________________</em>
<h2><em>Solve</em></h2>

Since we got  this is a right triangle since it's what we had before.
 this is a right triangle since it's what we had before.
 
        
        
        
Answer:
343 can be written as 

Step-by-step explanation:
since we know, 
343 = 7 × 7 × 7 
so, we can write 343 as cube of 7 
hence, 

 
        
             
        
        
        
Answer:C 5a^2 +70a +240
Step-by-step explanation:
 
        
             
        
        
        
Answer:
there is no picture
Step-by-step explanation: