jennileebeukes9 jennileebeukes9

03-08-2021
Mathematics

contestada

S=n/2(2a+(n-1)d). If d=5, n=13, S=585 find the value of a.

Respuesta :

aayu0302 aayu0302

03-08-2021

Answer:

15

Step-by-step explanation:

Sum of 'n' terms formula is given by:-

s=n/2(2a+(n-1)d)

s=13/2[2xa+(13-1)5]

s=13/2(2xa+12x5)

s=13/2(2a+60)

585=13/2(2a+60)

585 x (2/13) = 2a + 60

90 = 2a + 60

90-60 = 2a

30 = 2a

a = 15

Answer Link

Otras preguntas

QUESTION: Using the Cartesian Plane above, name the coordinate pair and the quadrant it is found in. Use the correct format (x, y) -> Quadrant ___ *

Factor $\frac{1}{3}$out of $\frac{1}{3}x-\frac{7}{3}$

Mother looked very distant, and was silent a long time. At last she said, “Of course not, darling.” She sounded displeased. Answer choices for the above questio

Access to medical care is the most important indicator of positive outcomes in late adulthood. O True O False

Which was a characteristic of the policy of mercantilism followed by Spanish colonial rulers in Latin America?

What was the Fugitive Slave Law? O Citizens would be put in jail if they helped Southerners capture runaway slaves. O Forced citizens to assist in the capture o

FIND THE EXACT AREA PLEASE HELPPPP ILL GIVE BRAINLIESTTTT

NO LINKS!! Find the volume of each sphere, both in terms of p and to the nearest tenth. Use 3. 14 for p. r = 6. 12 cm d = 54 in

What arts are there what arts are trends

Very Important). Read the passage. Then answer the question. " Taking the Plunge" What is the theme of " Taking the Plunge"? How does the theme emerge and devel