What is the sum of -10+-2=? and the mean of 3,-10,-2,13,11

Aportion of a line bounded by two points is defined as

Which is equivalent to 10/12? options: 10/18 5/6 3/12 9/11

You eat 8 strawberries and your friend eats 12 strawberries from a bowl. there are 20 strawberries left. which equation and solution give the original number of strawberries?