Mark is covering an 8-inch-square board with 1-inch-square tiles. he uses gray tiles to make four 2-in. by 2-in. squares. he covers the rest of the board with white tiles.
how many more white tiles than gray tiles will mark use?
four small rectangles inside a larger rectangle. two adjacent sides of the larger rectangle are labeled eight inches and eight inches. the four smaller rectangles appear to be the same size and are all shaded. two adjacent sides of one of the smaller rectangles are labeled two inches and two inches.

Tyler went to the supermarket to buy food for a food pantry. he has $36, and can carry up to 20 pounds of food in his backpack. pasta costs $1 for a 1-pound package. pasta sauce costs $3 for a 1.5 pound jar. let x = the number of packages of pasta and y = the number of jars of pasta sauce. one package of pasta is the right amount to go with one jar of pasta sauce. what is the best numbers of packages of pasta and jars of pasta sauce to buy for the food pantry? how many packages of pasta? how many jars of pasta sauce? explain your reasoning.