alan30
alan30
02-09-2017
Mathematics
contestada
how to find the sum of 2+4+6....+40?
Respuesta :
KhaiLi
KhaiLi
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.
Answer Link
VER TODAS LAS RESPUESTAS ( 14+ )
Otras preguntas
n a paragraph of seven to ten sentences, answer the following questions in relation to this passage from John F. Kennedy's 1963 Civil Rights Address: What idea
Vieques es un municipio de ____. la república dominicana puerto rico entre los atractivos de la isla se encuentra ____. un pico altísimo una bahía bioluminiscen
If you apply ghe change below to the quadratic parent function f(x)=x2 what is the equation of the new function? Shift 1 unit right vertically stretch by a fact
What is the reason for Hydreation?
A museum worker randomly displays 5 historical writings in a row. What is the probability that the worker lines them up from the oldest to the most recent from
Find the greatest perfect square that is a factor of the number 117
One pipe fills a storage pool in 20 hours. a second pipe fills the same pool in 15 hours. when a third pipe is added and all three are used to fill the pool, it
Geometry math question no Guessing and Please show work thank you
Help please a)If Sam's father monthly salary is $3,330, what is his annual salary? b) Bill sold his dog for $78. In doing so, he made a profit of $26. How much
How much naoh is needed to prepare 461 ml of solution with a ph of 10.00?