The metal in a penny is worth about 0.505 cent. how many cents is this written as a fraction

Kylie explained that (-4x+9)^2 will result in a difference of squares because (-4x+9)^2 (-4x+9)^2 =(-4x)^2+(9)^2=16x^2+81

Explain how you do each step what term makes it inconsistent y=2x - 4 ?

What is the ratio for the surface areas of the cones shown below, given that they are similar and that the ratio of their radil and altitudes is 4: 3? 23