im almost positive that you can leave it just like that because they aren't like terms so there's nothing to simplify but I put it into Symbolab and told it to simplify 15x + 5 and it gave me then put back into the calculator and it gave me 15x + 5 so I think that it's perfect the way you had it :) hope this helps
Im notr sure but if we take the chances that the 4 sum has to be either (1.3) (3.1) (2.2) (2.2) that means its chance is 4/36 for each roll which is also 1/9 ,, we can multiply 1/9 times the roll times ( 252 ) we get =28
The graph is misleading because the year’s interval is not constant.
The first year to the second year, the gap is 1 year; in the second to the
third year, the gap is 2; in the third to the fourth year is 4; and the fourth
to the fifth year is 6.
