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 ( 45+ )
Otras preguntas
What is 100,203 in expanded form
What roles do proteins play in organisms?
what 5000 is 1/10 of?
how do I round off 248,739 to the nearest hundred?
how is the shape of an enzyme related to its function?
What is the best estimate for the product of 289 and 7?
How many neutrons are probably in the nucleus of an element of atomic weight 197? a. 43 b. 79 c. 83 d. 100 e. 118
There are 35 boys in sixth grade. The number of girls in the sixth grade is 42. Lonnie says that means the ratio of number of boys in the sixth grade to number
30% of a number is one-thirtieth of x, find the initial expression as a fraction of x
S=-1/2gt^2+vt Solve for v
