Answer: 50 miles
Step-by-step explanation:
Figuring this out is fairly simple, all you need to do is find out how many sets of 8 km are in 80km and multiply that number by 5. So you divide 80 by 8 and you get 10, then multiply 10 by 5 and you'll get 50. There are 50 miles in 80km.
Answer:

Step-by-step explanation:
![g(-x)=55(-x)+3(-x)=-55x-3x \\\\-g(x)=-[55x+3x]=-55x-3x=g(-x)\\\\-g(-x)=-[-55x-3x]=55x+3x=g(x)](https://tex.z-dn.net/?f=g%28-x%29%3D55%28-x%29%2B3%28-x%29%3D-55x-3x%20%5C%5C%5C%5C-g%28x%29%3D-%5B55x%2B3x%5D%3D-55x-3x%3Dg%28-x%29%5C%5C%5C%5C-g%28-x%29%3D-%5B-55x-3x%5D%3D55x%2B3x%3Dg%28x%29)
111.
660/6 = 110. In order to make a profit you need to sell at least one more than that.
Hope this helps.
For this case, the first thing to do is define variables.
We have then:
- <em>x: number of nickels
</em>
- <em>y: number of dimes
</em>
- <em>z: number of quarters
</em>
We write now the system of equations:

Then rewriting the equations we have:


Then, substituting values we have:
Finally:

Answer:
19 nickels
14 dimes
7 quarters
-2x+10
Leave a comment if any doubt