Which equation represents a line which is perpendicular to the line 4x-y=-24x−y=−2?

Find the value of x. round the length to the nearest tenth

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

What else equals 42 and 30 for multiply