Answer:
Linear equation for the monthly cost of the cell plan is 
Step-by-step explanation:
Let u denotes a flat monthly fee and v denotes amount charged per minute.
As the monthly cost is $71.50 if a customer uses 410 minutes,
(i)
As the monthly cost is $118 if a customer uses 720 minutes,
(ii)
Subtract (i) from (ii)

Put
in (i)

As x denotes the number of monthly minutes used,
linear equation for the monthly cost of the cell plan is 
It is 540 miles because 15x4 is 60 and that is a full hour so you have to multiply 135x4 which is 540
Answer:
here i hope this help im not sure if a can find the exact answer your looking for but here is a formula
Given:
2 3/4 cups of tomatoes.
Number of cups of tomatoes written as a fraction greater than one.
2 3/4 is a mixed fraction. It is called such because it is a combination of a whole number and a fraction.
To find the number of cups of tomatoes written as fraction greater than 1, we need to convert the mixed fraction into an improper fraction.
Improper fraction is a fraction whose numerator is greater than its denominator.
2 3/4 ⇒ ((2*4)+3)/4 ⇒ (8+3)/4 ⇒ 11/4
11/4 is a fraction greater than one.
4/4 is a fraction that is equal to one. So, any numerator that is greater than 4 is a fraction that is greater than one. In this case, it is 11/4.
Your answer is the matrix with the top row of -8 20 0 and bottom row of
4 32 -4