Find the length of the rectangle if x= 10. And find the perimeter if x=10

PLEASE HELP .

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.

You are a clerk at convenience store. a customer owes 11.69 for a bag of potatoes chips. she gives you a five dollar bill. how much change should the customer receive?

Hi, can anyone show me how to do this problem? 100 points for this. in advance