Which number line correctly shows 0.8 + 0.3?

Me, prove a quadrilateral with vertices g(1,-1), h(5,1), i(4,3) and j(0,1) is a rectangle using the parallelogram method and a rectangle method.

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?

Aregular pentagon with a perimeter of 21 inches is dilated by a scale factor of 5/3 to create a new pentagon. what is the perimeter of the new pentagon?