Find the slope and y-intercept of each line. y= 5

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 is the average rate of change for this function for the interval from x=2 to x=4 ?

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?