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

Let f(x) = 2x, g(x) = 2x^2 – x, and h(x) = 3x. Lola finds the composition [f o g o h](x) as shown below. What error did Lola make? = 2[2(3x)^2 – 3x] = 2[2(9

When 2251 voters were polled, 52% said they were voting yes on an initiative measure. find the margin of error and an interval that is likely to contain the tru

I WILL REWARD BRAINIEST ANSWER :))) PLEASE HELP ASAPPPPPP Which statement about the sui dynasty is correct? A: It's first ruler was Wendi, who unified Northern

1.Write an original sentence with two independent clauses and punctuate them with a semicolon. 2.Write an original sentence containing a correctly spelled word

how many vocabulary words do you need to rescue unit 1

What did Abraham Lincoln believe about slavery? The Union had to become either all free or all slave. Slavery was becoming less common, even in the South. Slave

Read the paragraph. north run high school hosts a wide variety of clubs. some clubs are academic, such as the debate club, foreign-language clubs, and the chess

9x+2y and 11xy equivalent

ASAP QUESTION HELP Solve 4m²n = 49 for m. A. m=±7n√2n B. m=±7n√2n C. m=±7n√2 D. m=±7n√2

Which statement is true regarding scientific laws? Scientific laws are scientists' opinions of why events occur. Scientific laws are facts that describe obs