Which function is represented by this graph?

What is the simplified expression for 6(2(y+x))

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 center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?