aljanahi2 aljanahi2

25-06-2020
Mathematics

contestada

The sum of the first 10 terms of the arithmetic series for which a1 =
is
180, a2 =
150, and a3 = 120

Respuesta :

09pqr4sT 09pqr4sT

25-06-2020

Answer:

[tex]450[/tex]

Step-by-step explanation:

[tex]a_1=180\\a_2=150\\a_3=120[/tex]

[tex]d=-30[/tex]

[tex]a_n=-30n+210[/tex]

[tex]a_4=90\\a_5=60\\a_6=30\\a_7=0\\a_8=-30\\a_9=-60\\a_{10}=-90[/tex]

[tex]180+150+120+90+60+30+0-30-60-90=450[/tex]

Answer Link

Otras preguntas

Write an email to a friend about the school trip to the museum. (100-150 words).

8. There are more than 100 billion stars, including the Sun, in our solar neighbourhood (Figure 5). What do astronomers call this collection of stars?

help me plzzzzzzzzzzzzzzzzz

How did you find the music? Do you somehow relate to it?

if I rolled a 6 sided dice, what is the probability of rolling a 5?

Two angles form a linear pair. The measure of one angle is 1 and 1/2 times the measure of the other angle. Find the measure of each angle.

Point A is at (-7, -7) and point M is at (-6, -1). Point M is the midpoint of point A and point B. What are the coordinates of point B?

What was the Southern economy like in the years following the Civil War

b+2=-5 answer this please

What drawn-out conflict cost England a lot of money causing them to increase taxes on the colonies?