Prove: If the number a+7b is divisible by 17 , then the number 10a+2b is divisible by 17

Rearrange the formula c^2 = a^2 + b^2 for b

Twelve less than a number is at most 20

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