At a restaurant, you pay $13 bill and have $16 left in you pocket. write an equation to find the amount of money in your pocket before paying the bill

Can you me find the missing length. i attached an image.

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

Hurrya vegetable garden and a surrounding path are shaped like a square that together are 11ft wide. the path is 2ft wide if one bag of gravel covers 9 square feet how many bags are needed to cover the path