The triangle below has a total perimeter of 450 cm: picture of a triangle with sides 128 and 150. third side unknown write an equation and solve it to find the length of the longest side of the triangle.

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

Problem melissa is her dad build a walkway in their backyard. the walkway will be 54 feet long and 1.5 feet wide. the local hardware store sells tiles which are 1.5 by 1.5 feet and come in boxes of 12. how many boxes of tiles do they need?

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