The first part (one hundred and three) can be expressed the same way you'd express any integers, simply as 103. To add the nine tenths, you simply add a nine in the tenths place, which is the digit immediately following a decimal point. As a result, the number is 103.9.
D there is always a 1 infront of a variable but since x2 has the largest degree it gives it priority over the others so what ever numbe in front of it is the leading coefficient
