What two numbers that if multiplied equal -90 and if added equal 8?

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

Opposite angles in a parrellelogram are

Given that y varies directly to the square root of (x + 1), and that y = 1 when x = 8,(a)express y in terms of .x,(b)find the value of y when x = 3,(c)find the value of x when y = 5.