1. If y<span>ou have jogged 5 miles from the park at a rate of r miles per hour, then the time you need to do this is

hours (

, where S is distance, v-speed and t-time).
</span>
2. W<span>hen you run back to the park, your average speed increases by 1 mph and become r+1 mph.
</span>
3. I<span>t takes

hours to jog 5 miles back to the park</span>
4. T<span>he total jogging time T is

hours.</span>
<span />
5. If you jogged away from the park at an average speed of 4 miles per hour, then r+1=4 and r=3. The expression

will take look
<span>

hours.</span>
B,
as 32 is double 16, since 8 is double 4
Okay so in this question it says to solve f(7). This means to plug in the 7 every where you see an x, so that it looks like this:
Then you'll solve it like a normal equation.
Hope this helped! Let me know if there is anything I need to clarify or explain more in depth!
Number 4 is B and number 5 is A (sorry if it’s wrong)