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2 years ago

Please please please helpppp

Mathematics

1 answer:

frez [133]2 years ago

5 0

840 in 2 hours is the answer

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Find the sum of the first six terms of the sequence. S6 = ⇒ 84

k0ka [10]

Answer:

Explained below.

Step-by-step explanation:

Consider the series is a set of first 6 natural numbers.

Sum of first n terms is:

$\text{Sum of n terms}=\frac{n(n+1)}{2}$

$\text{Sum of first 6 terms}=\frac{6(6+1)}{2}$

$=3\times7\\=21$

Consider the series is an arithmetic sequence.

Sum of first n terms is:

$S_{n}=\frac{n}{2} [2a+(n-1)d]$

Here,

a = first term

d = common difference

Consider the series is an geometric sequence.

Sum of first n terms is:

$S_{n}=\frac{a_{1}\cdot(1-r^{n})}{(1-r)}$

Here,

a₁ = first term

r = common ratio

7 0

2 years ago

The equation Y-3=-2(x+5) is written in point-slope form. What is the y-intercept of the line?

xz_007 [3.2K]

Answer:

Step-by-step explanation:

hello :

y-3=-2(x+5)

y - intercept when : x=0 : y-3 =-2(0+5)

y-3 =-10

y = - 7

7 0

2 years ago

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A blank expression like (3+5)x(4-1) is a combination of numbers and least one operation

Brums [2.3K]

Answer:

Hey the answer is = 24x

Step-by-step explanation:

An algebraic expression comprises both numbers and variables together with at least one arithmetic operation. To evaluate an algebraic expression you have to substitute each variable with a number and perform the operations included.

HOPE THIS HELPS!

8 0

3 years ago

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(x^2-1)(4x^3-3x^2+5)

emmainna [20.7K]

Anwser: 4x^5-3x^4-4x^3+8x^2-5

Step-by-step explanation:

yes

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1 year ago

When y=_7, find the value of 2y2- 9

topjm [15]

2x(-7)^2-9 = 2x49-9=98-9=89 maybe

7 0

2 years ago