Please guys If you are really good at math can you please help me with my classwork

The zoo collects $9.60 for every 24 tickets sold. how much will be collected for 400 tickets?

2x minus y equals 6, x plus y equals negative 3

You can ride your bike around your block 6 times and the whole neighborhood 5 times in 16 minutes. you can ride your bike around your block 3 times and the whole neighborhood 10 times in 23 minutes. how long does it take you to ride around the neighborhood?