The sides of a triangle are x, x+7, and 2x-8. if the perimeter of the triangle is 47, what is x

What number must you add to complete the square x^2+12x=16

Me write an equation for the interior angles of this triangle that uses the triangle sum theorem

Suppose a ball is dropped fromca height of 6ft. it bounces back up but time it bounces, it reaches only 7/10 of its pervious height. what is the total of each height that the ball reaches after 5 bounces