Either
if he pays her back: 42.80-12 --------- this would equal 30.80
or if she pays him back 42.80+ 12------- this would equal 54.80

Because there's one 3 & four 7's .

Because there are two 2's & four 9's
Answer:
Correct choice is B
Step-by-step explanation:
All given options represent quadratic function. Let the equation of this quadratic function be

Then
1. 
2. 
3. 
Solve the system of two equations:

Then

Thus, the equation of the function is

Note that


12s, you don’t have a value for s, so the problem can’t be fully solved but if you did you would multiply 12 by her speed
Hope this helps