Answer:
Each card will have a value of $15 when they equal after 600 days which also is 20 30-day periods.
Step-by-step explanation:
Card1: 
Card2: 
x is number of days

2550 - 3.50x = 2250 - 3x
2550 - 0.50x = 2250
-0.50x = -300
x = 600 days
Card1: 
85 - 70 = 15 dollars
Card2: 
75 - 60 = 15 dollars
6 because 6.39 isn't half way if it was 6.50 it would've been 7 so the answer is 6.00
Answer:

Step-by-step explanation:
The distance Thomas walked to the nearest gas station is
.
The conversion factor for miles to feet is

So


Hence, Thomas had to walk
to get to the nearest gas station.
A(b-c)
First substitute values
-8(12+4)=
Next, solve using ordering of PEMDAS
-8 (12+4)=
-8 (16)=12