Which term has the definition "A formula that state that in a right triangle, the sum of the squares of the legs is equal to the square of the hypotenuse, that is a2 + b2 = c2 where a and b are the legs of the triangle and c is the hypotenuse"?

Julius went on a volunteer trip to centralamerica and took medical supplies with him.he packed a bag with 50 pounds of supplies.he brought pieces of equipment that weighed10 pounds each and bottles of medicine thatweighed pound each prepresents thenumber of pieces of equipment he broughtand b represents the number of bottles ofmedicine he brought then the total weight canbe represented by the equation 10p+b 50.the brought 3 pieces of equipment, how manybottles of medicine did he bring?