Answer:
-6x-4
Step-by-step explanation:
Combine 6x and −12x to get −6x.
−6x−7+3
Add −7 and 3 to get −4.
−6x−4
6x-12x
-6x
-7+3
-4
-0.25 or 1/4
Eh just know
minutes/mile
minutes=7.5-2.5
=55
55/10
5.5 minutes per mile