Answer:
Jada will be .6 miles ahead of Elena
Step-by-step explanation:
3 miles per hour times 3 (for the 3 hours) gives you nine miles.
2.8 miles per hour time 3 ( for the 3 hours) give you 8.4 miles.
Subtract 9 by 8.4 to get .6 miles.
Number one is the correct answer note it mentions a straight line number to implies a parabola numbers three and four imply two lines that intersect those are not functions the answers number one
First example:
Subtract the 8n on both sides to get the variable on one side of the equation. Do the same for the regular numbers. Then divide by -3.

This should be your final answer.
Second Example:
Do the same thing as explained in Example 1. Here's some work to help guide you.

That should be your final answer here.
Third Example:

Hope this helps and its understandable! Let me know if you still don't understand.
When you see the word 'and' that's where you have to put the decimal when writing a number in standard form.
So you would write this number as 17,000.106
Hope this helps. :)