Please help:)I’m not good at math and need to get this done ASAP

When i add money am i supposed to make it like this 7+12 or 7.00+12.00 because i got 19 dollars for my answer

You are cycling around europe with friends. a cycling festival is starting soon in barcelona. it will take 4.5 hours to cycle there. how many minutes in total is this?

Pete is making decorations for a dinner party. the instructions tell him to use 9 flowers for a medium-sized decoration. complete each statement to adjust the flowers for different-sized decorations based on these instructions.