the sum of the 1st 8 terms of an AP is 80 and the sum of the next 4 terms is 88. determine the AP?

3 answers

8/2 (2a+7d) = 80
12/2 (2a+11d) - 80 = 88

Now just solve for a and d.

Which formula am I going 2 use

How are am I going to do this

Similar Questions

Identify the terms as like or unlike terms.10xy, −15xy 10 𝑥 𝑦 , − 15 𝑥 𝑦 (1 point) Responses The terms are like
1. 1 answer
Identify the terms as like or unlike terms.10xy, −15xy (1 point) Responses The terms are like terms. The terms are like terms.
1. 1 answer
How many terms does this polynomial have? x5+2x3−x2+7 (1 point) Responses 2 terms 2 terms 5 terms 5 terms 3 terms 3 terms 4
1. 1 answer
Use the table to answer the question.Terms 1 10 20 Terms 2 20 40 Terms 3 30 60 Terms 4 40 80 Divide to prove each ratio is
1. 3 answers