Register
If 18,a, b,-3 are in AP, then a+b is equal to​
69.9k views
1 vote
If 18,a, b,-3 are in AP, then a+b is equal to​

User Oleg Sh
by
3.8k points

1 Answer

5 votes

Answer:

a + b = 15

Explanation:

The common difference d between consecutive terms is

d = a₂ - a₁ = a - 18

d = a₄ - a₃ = - 3 - b

Thus

a - 18 = - 3 - b ( add b to both sides )

a + b - 18 = - 3 ( add 18 to both sides )

a + b = 15

User Turbonerd
by
4.1k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

4.4m questions

5.6m answers

Other Questions

Before beginning voice lessons, Aubrey already knew how to sing 357 pieces, and she expects to learn 2 new pieces during each week of lessons. After 78 weeks of voice lessons, how many pieces will Aubrey
A study was completed in Florida. In southern Florida, the study involved 3,000 patients; 54% of them experienced flulike symptoms during the same month. The study had a margin of error of 1.8%. What does
Solve for x in the equation 3 x squared minus 18 x + 5 = 47. (I need this to be an answer like X=3+\_ square root 23)
1 divided by 1/5????????
The endpoints of line AB are A(−9,−1) and B(−3,7). Find the coordinates of the midpoint M.
Link Copied!