Answer:
48.50
Step-by-step explanation:
9.70 x 5
Answer:
$30
Step-by-step explanation:
He first has 10 dollars. Then 5 is taken off.
So, 10-5=5
His friend gives him 25 more dollars
So, 25+5= 30
Hope this helped!
Answer:
$6
Step-by-step explanation:
Hourly rate is $1.5
Answer:
10 miles.
Step-by-step explanation:
Let x be the number of miles on Henry's longest race.
We have been given that Henry ran five races, each of which was a different positive integer number of miles.
We can set an equation for the average of races as:
![\frac{\text{The sum distances of 5 races}}{5}=4](https://tex.z-dn.net/?f=%5Cfrac%7B%5Ctext%7BThe%20sum%20distances%20of%205%20races%7D%7D%7B5%7D%3D4)
As distance covered in each race is a different positive integer, so let his first four races be 1, 2, 3, 4.
Now let us substitute the distances of 5 races as:
![\frac{1+2+3+4+x}{5}=4](https://tex.z-dn.net/?f=%5Cfrac%7B1%2B2%2B3%2B4%2Bx%7D%7B5%7D%3D4)
![\frac{10+x}{5}=4](https://tex.z-dn.net/?f=%5Cfrac%7B10%2Bx%7D%7B5%7D%3D4)
Let us multiply both sides of our equation by 5.
![\frac{10+x}{5}*5=4*5](https://tex.z-dn.net/?f=%5Cfrac%7B10%2Bx%7D%7B5%7D%2A5%3D4%2A5)
![10+x=20](https://tex.z-dn.net/?f=10%2Bx%3D20)
Let us subtract 10 from both sides of our equation.
![10-10+x=20-10](https://tex.z-dn.net/?f=10-10%2Bx%3D20-10)
![x=10](https://tex.z-dn.net/?f=x%3D10)
Therefore, the maximum possible distance of Henry's longest race is 10 miles.