4.8n + 3.2n simply the expression mathematics

What is the slope of the line passing through the points (-5, 7) and (-3,5)?

Ahmed plans to add a rectangular sunroom to his house. the sunroom will have a length of 14 feet and a width of 10 feet, and the construction will cost $40 per square foot. how much more would the sunroom cost if it’s width were increased to 12 feet?

Wesley is making patio from stones of two sizes, 5 inches wide and 10 inches wide. he wants to begin and end his pattern. with a 10-inch so there will be one more of the 10-inch stones than of the 5-inch stone. his patio will be 130 inches wide how many 10-inch stones will wesley need for one row ?