Jonathon stated that 0.20 of his coins were quaters. what percentage of jonathons coins are quaters

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

Which one ? is the answer and how to find this answer

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