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 ( 29+ )
Otras preguntas
If i traveled from Georgia to California what ecosystem would i not run inot
estion. 10. Leticia walks down stairs, alternating her feet. Leticia is probably _______ year(s) old. A. four B. two C. one D. three
The Raft of the Medusa is associated with what European style of art? A)Renaissance B)Baroque C) Rococo D) Romanticism
Tectonic plates move at rates that are approximately ____________. a. 1 to 5 cm every 1,000 years b. 1 to 15 m/year c. 10 to 100 m/year d. 1 to 15 cm/year
which action could be considered an effect of the protestant reformation
What are the coefficients that will balance this skeleton equation? a l c l 3 + naoh → al(oh) 3 + nacl?
Two Forces are exerted on an Object In a Vertical Direction: A 20N force downwards, and 10 N force upwards. The mass of the object is 25KG. WHAT IS THE NET FORC
A car travels at an average speed of 68 miles per hour. how many miles does it travel in 5 hours and 15 minutes?
While traveling in India, Sabina notes all of her daily expenses in rupees in her spreadsheet. At the end of the day, she wants to see how much each expense was
if you burn 6 calories a minute jogging, how many calories will you use if you run an hour
