The diagonal of a square is 20√2 units. Find the perimeter of the square. Having some trouble with this question, please help...

Kapil needed to buy a long wooden beam. he went to two sawmills that each charge an initial fee plus an additional fee for each meter of wood. the following equation gives the price (in dollars) of a wooden beam from the first sawmill as a function of its length (in meters). p = 5+20xp=5+20x

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Could someone with number 1 and 2