6th grade mathematics
Find the number that makes the ratio equivalent to 40:16

5:

Turner's mom measured his room to see how long the wallpaper border needed to be. if two walls are 15 feet long and two walls are 12 feet long, how long should the strip of border be cut?

Acircle has a diameter will endpoints of (-2,8) and (6, 4). what is the center of the circle

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1