Mathematics: Simplify each expression -7x+4(1+x) need answer

sum of the first 27 terms = -1431Step-by-step explanation:arithmetic series sum of the first n terms formula:n = 27 termsfirst term, a = 25common difference, d = 19 - 25 = -6substitute the values into the formula...

Simplify each expression -7x+4(1+x) need answer - id7416933713, kcarstensen59070

Ответ:

antisnitch1

29.01.2022

Mathematics

I got

Step-by-step explanation:

-7x+4(1+x)

-7x+4+4x

\ /

-3x+4

-3 -3

X= -0.75

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Ответ:

chase6158

15.05.2023

Mathematics

sum of the first 27 terms = -1431

Step-by-step explanation:

arithmetic series sum of the first n terms formula:

$s_{n} = \frac{n}{2} (2a + (n - 1)d)$

n = 27 terms

first term, a = 25

common difference, d = 19 - 25 = -6

substitute the values into the formula

$s_{27} = \frac{27}{2} (2(25) + (27 - 1)( - 6))$

$s_{27} = 13.5(50 + 26( - 6))$

$s_{27} = 13.5(50 - 156)$

$s_{27} = 13.5( - 106)$

$s_{27} = - 1431$

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Simplify each expression -7x+4(1+x) need answer

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