and
both have a common denominator, so you can combine them into a single fraction:

You cannot simplify this fraction further:
- - - - - - - - - - - - - - - - - - - -
Answer:

- - - - - - - - - - - - - - - - - - - - -
Answer:
Step-by-step explanation:
We know that , the equation of a line that passes through (a,b) and (c,d) is given by :_

Standard form of equation of line = 
Given points = (7, -3) and (4, -8)
Then, the equation of a line that passes through the points . (7, -3) and (4, -8) is given by -

[∵ (-)(-)=(+)]
Or
Hence, the required equation :-
The maximum number of hours for which you can rent the scooter is: 4 hours
<h3>Cost of renting;</h3>
According to the question;
- The maximum amount you can spend for renting a motor scooter is $50
- The rental fee is $12 and the cost per hour is $9.50.
The inequality to determine the maximum number of hours you can rent the scooter is;
Solving the inequality, we have;
h <= 4hours.
Read more on cost of renting;
brainly.com/question/10563785