HELP PLEASE!! PLEASE ANSWER CORRECTLY. ILL GIVE BRAINLIEST TO THE RIGHT ANSWER

Country carpets charges $22 per square yard for carpeting, and an additional installation fee of $100. city carpets charges $25 per square yard for the same carpeting, and an additional installation fee of $70

Which values for a and b will create infinitely many solutions for this system of equations? ax-y=8 2x+y=b

Kyle and elijah are planning a road trip to california. their car travels 3/4 of a mile per min if they did not stop driving, how many miles could kyle and elijah drive in a whole day? ? 1 day = 24 hours. plzzz i will give you 100 points