Here you go the problems are on the word document

2. absolute value, expression, integer.
3. This is what you have learned.
4.
A. Row 6 is
48 50 52 54 56 58
58-48=10
At the end of each row you add 5 to get the first number to the next row and then add to till you reach the end of the row.
B. an=a×rⁿ⁻¹
C. 143 last number is 163
D. The second picture is this one

I hope this helps

1.17+3.99a. you combine the terms with a to create 3.99 and the 1.17 stays because it has no like terms or a variable