celia donates 10.2 inches of her hair to a company that makes wings.danielle donates 2.4 fewer inches of her hair than celia.how many total inches of hair do the two girls donate combined
mathematically the answer to that is 18 because 10.2 minus 2.4 is equal to the difference of 7.8 and 7.8 plus 10.2 is equal to the sum of exactly and positively 18