isahussain1203 isahussain1203

15-05-2020
Mathematics

contestada

NEED HELP!!!!!!!!!!!!!!!!!!!!!

NEED HELP class=

Respuesta :

Chelboy Chelboy

15-05-2020

Answer:-602

Step-by-step explanation:

First term=a=-143

common difference=d=-134-(-143)=9

Using the formula

Sn=n/2(2a+d(n-1))

S28=28/2 (2(-143)+9(28-1))

S28=14(-286+9x27)

S28=14(-286+243)

S28=14(-43)

S28=-602

Answer Link

Otras preguntas

Which cells engulf antigens and present fragments of them on their own surfaces where they can be recognized by cells that will deal with them?plasma cellsT lym

Think about the main job if your red blood cells. If red blood cells couldn't deliver oxygen to your cells, what would be the condition of your body tissues?

A rectangular school yard has a perimeter of 248 meters and an area of 3,444 square meters. What are the dimensions of the school yard?

x2 = 8y. Step 1: What is the value of a for the given parabola? Enter the expression for the value of

PLEASE HELP ASAP ILL APPRECIATE IT SO MUCH

The Iran-Contra Affair ______.

Need help please and thank you. 1. Solve. 8x^2+5=35.

PLEASE ANSWER AND EXPLAIN | 98 POINTS

how often do you and your best friend argue??

Can someone helpp me with this english assigment lol for the third timee.