The given question is 8+13+18+...... which is in arithmetic progression . And for arithmetic series, we have to use the following formula for nth term .

Here a =8 , d=5
So we get

And the required expression for n=7 is

Answer:
do 8 times 4.2 then subtract the .6 to get to 33 hope this helped
Answer:
36.50
Step-by-step explanation:
Do 589.00-552.50 to get her current acc balance. So you get 36.50. That means she cannot buy all the books