taraschaefer taraschaefer

25-09-2018
Mathematics

contestada

What is the sum of ten terms of a finite arithmetic series if the first term is 13 and the last term is 89?

A. 500
B. 520
C. 490
D. 510

Respuesta :

25-09-2018

Formula for the sum of n terms of a finite arithmetic series is

[tex]S_n=\dfrac{a_1+a_n}{2}\cdot n.[/tex]

If [tex]n=10,\ a_1=13,\ a_{10}=89,[/tex] then

[tex]S_{10}=\dfrac{13+89}{2}\cdot 10=51\cdot 10=510.[/tex]

Answer: 510.

Answer Link

Otras preguntas

In hierarchical organizational structures, communication between employees tends to: a)be very difficult to achieve at all. b)occur across organizational functi

What goes in to 37 and 100?

Maren is painting some doors that are all the same size. She used 3 liters of paint to cover 1 4/5 doors. How many liters of paint are needed for 1 door?

The measure of angle D is 5 times the measure of angle E. The two angles are supplementary. Find the measure of each angle.

7. An example of a compound is _____. a) chicken noodle soup b) powerade c) air inside a balloon d) lead pipe e) baking soda (NaHCO3)

The study of passing traits from parents to offspring is known as

help please i dont wanna pull an all-nighter ill give 20 points i really dont care at this point

y=x^2+6 what values of x give a y value of 7

Which situation is most similar to the "positive feedback loop" (line 20) described in Passage 1? a. A professional tennis player wins a tournament, which then

Given a floating-point variable fraction, write a statement that writes the value of fraction to standard output. Do not write anything else to standard output