Victor played the guitar in 8 concerts this month. If each concert lasted 2.75 hours, which expression can be used to find how many hours Victor played the guitar in the concerts?

Use the formulas a = x 2 – y 2, b = 2xy, c = x 2 + y 2 to answer this question. one leg of a right triangle has length 11 and all sides are whole numbers. find the lengths of the other two sides. the other leg = a0 and the hypotenuse = a1