02-09-2017
Mathematics

contestada

how to find the sum of 2+4+6....+40?

Respuesta :

02-09-2017

Answer 420.
a, is the first term. d is difference.
Since this is an arithmetic progression, I use this formula.
Un = nth term
Sn = sum of terms.
First find the number of terms, which is 20.
Then use the second formula to find the sum.

Ver imagen KhaiLi

Answer Link

Otras preguntas

Below is the market for kumquats in the United States both with free trade (without a quota) and with a quota Calculate each of the values in the following tab

I need to find the easiest way to learn how to divide fractions and mixed fractions. I also don't get how to simplify.

100 POINTS AND BRAINLIEST FOR CORRECT ANSWER (URGENT!!!) Kara promised to do 5/9 of the job. So far she has done only 3/5 of what she promised to do. Kara has f

Write a polynomial P(x) of degree 5 and with zeros 2, 5/2, (which of multiplicity one) and 0 (of multiplicity 3). Note: if x-c is a zero of P(x) of multiplicity

frank had a 1.5kg bag of potting soil. he used 420g of soil to pot a plant. how many kilograms of soil are left in a bag?

Find the sum or difference 8+(-5)

Indicate whether each ecosystem is SALTWATER, FRESHWATER or BOTH.A. Coral reefsB. EstuariesC. Rivers and streamsD. Open oceansE. Lakes and pondsF. Wetlands

oranges cost $3.42 for 9 pounds at this rate how much would 12 pounds cost ?

9x-12=5x-4 pls help

1) Jonah and three of his friends are splitting the dinner bill equally among themselves. Their total bill came to $86 before tax. If they want to leave an 18%