I feel asleep in class and im failing algebra Please help!

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.

It says factor each expression 49x-28?

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20