I know this probably isn't helpful to you, but the answer is 15. I suck at showing my work. So I really can't help you there. Sorry I couldn't be more help.
Step-by-step explanation: What I did was figure out what 10% of 12 was (1.2) then multiplied it by 6 which was 7.2. Then I added that to 12 and got 19.2.
Y=mx +b plug that in , so the 23.95 would be the flat fee then you add 0.32 250 =23.95+0.32 subtract from both sides then divide the answer is 10 miles
