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 ( 15+ )
Otras preguntas
which are different forms of the same gene?
in which phase of matter are the atoms closely packed but still able to slide past each other?
The largest organ in your body is your ______.
when is a caesarian section typically performed
a company pays $379.50 for its employees to attend a luncheon. if the cost is $8.25 per person, how many employees does the company have?
When a machine is used to perform a task, work output is always more than work input. please select the best answer from the choices provided t f?
If it's cloudy, 60% likely it will rain. In general on any given day it's 50% probability it will be cloudy. The probability it will be cloudy and rainy tomor
A student earns a flat rate of $30/day planting trees, plus $0.50/tree planted. Create a table of values and scatter plot showing the amount earned on days when
Given the two points (0,4) and (2, 6), what would the numerator of the equation for slope be?
currently there are amendments to the us constitution that safeguard citizens’ rights.