Rihanna deposited $20.00 in her school cafeteria account. In one week she spent$16.75 on lunches. If the starting balance on her account was – $12.65, what transaction does Rihanna need to make to bring her cafeteria account to zero?

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?