001237980 001237980

01-12-2021
Mathematics

contestada

The second term of an arithmetic sequence is –5, and the third term is –20. What is the first term?

Respuesta :

jimrgrant1 jimrgrant1

01-12-2021

Answer:

a₁ = 10

Step-by-step explanation:

The common difference d is calculated as

d = a₃ - a₂ = - 20 - (- 5) = - 20 + 5 = - 15

Then

a₂ - a₁ = d , that is

- 5 - a₁ = - 15 ( add 5 to both sides )

- a₁ = - 10 ( multiply both sides by - 1 )

a₁ = 10

Answer Link

Otras preguntas

Which two of the following were main causes of Arab Israeli conflict in the twentieth century

By the mid-nineteenth century, the Romantic period in Europe and Great Britain was coming to a close. What criticisms of the movement do you think the artists a

After World War II, the United States encouraged other nations to adopt to what

Read the sentence. Young kids in Afghanistan play a game called topay-danda, which is like stickball. Which word is the direct object in the sentence? stick

the ten commandments were important to the development of modern democracy because they: a. created the basic political processes used in modern direct democra

HELP PLEASE! Amani goes to her local carpet outlet to purchase some new carpet for her living room. The dimensions of her living room are 15 feet by 15 feet. If

All spreadsheet formula should start with

•WILL GIVE BRAINLIEST!• The chart shows the numbers of lines Ana and Daris used in poems they wrote. Based on the data, which statement is true? A. In Ana’s d

When does interest on a Direct Unsubsidized Loan begin to accrue?

sorry wrong problem if ab =58 find the value of x