for the first one I am not sure if it has to be negative.But I don't think it matters so you just basically subtract both numbers and you get 610 feet as the difference.
For the second,you first have to divide 12 by 4 because it says he ate 1/4 of the entire dozen.You will get 3. So you then subtract 3 from 12 to see how much cupcakes are left 12-3=9
After that you divide 9 cupcakes between 3 friends . 9÷3= 3 So each friend gets 3 cupcakes.
now that you know each person(4 including Kevin and his 3 friends) got 3 cupcakes.You are able to divide $17.40(price of vanilla cupcakes) by 4.
$17.40÷4= $4.35 So Kevin spent $4.35 on each friends' cupcakes.
