SarahShearer2002 SarahShearer2002

16-11-2018
Mathematics

contestada

Find the sum of the first 20 terms of the arithmetic sequence 4, 10, 16, 22....

Respuesta :

jcherry99 jcherry99

23-11-2018

n = 20

d = 6

a = 4

L = a + (n - 1)*d

L = 4 + (20 - 1)*6

L = 4 + 19*6

L = 118

Sum = (a + L)*n/2

Sum = (4 + 118) * 20/2

Sum = 122 * 10

Sum = 1220

Answer Link

Otras preguntas

How will this system at equilibrium be affected by each of the conditions stated here?removal of h2oaddition of o2 decrease in pressureincrease in temperature a

ILL GIVE BRAINLIEST TO THE FIRST PERSON WHO ANSWERS IT CORRECTLY!!!

Find the number of positive integers n less than 10000 such that there are more 4's in the digits of n+1 than in the digits of n. a) 5025 b) 5010 c) 10,025 d) 1

Forgetting is often related to the passage of time, and is known as the process of ________.

Which of the following snippets of C code would behave differently depending on the endianness of the machine? a) Code 1 b) Code 2 c) Both codes d) Neither code

What reactant or product would you use to measure the rate of this reaction: Mg + 2HCl ⟶ MgCl2 + H2?a) Mgb) HClc) MgCl2d) H2

If ( f(x) = 1-x/1+x ), then what is the value of ( f² (2) ) where ( fⁿ ) represents the ( n )th power of the function ( f )?a) 1b) -1c) 2d) -2

find the sum 637,391+372,088

What percent of adults with mental health symptoms believe that others are caring and sympathetic to persons with mental illness? a) 25% b) 50% c) 75% d) 100%

Learning Task 5: In your notebook, rewrite the sentences below byinserting the given present time expressions inside the parentheses.(often)1. Aunt Chelo buys f