If B = − 3 x − 7 x 2 B=−3x−7x 2 and C = − x 2 − 8 − x , C=−x 2 −8−x, find an expression that equals 3 B − 3 C 3B−3C in standard form.

Apool measures 100 meters by 100 meters a toddler inside the pool and trows a ball 60 centimeters from one edge of the pool.how far is the ball from the opposite edge of the pool