You are testing two food scales  for accuracy by weighing two different types of foods. Use the drop-down menus to complete the statements about the scales accuracy

What is the size of the matrix resulting from

What is the difference between the predicted value and the actual value

How many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.) how many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.)