Help me? please?

Sal is tiling his entryway. the floor plan is drawn on a unit grid. each unit length represents 1 foot. tile costs $1.35 per square foot. how much will sal pay to tile his entryway? round your answer to the nearest cent.

What term best describes a line and a point that lie in the same plane? a. congruent b. coplanar c. collinear d. equal

Which simplifys to a+ b? a-(1-b)+1 -(1-a)-b+1 (a--1) -1)+1