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2 years ago

Help me find the answer please!

Mathematics

2 answers:

Eddi Din [679]2 years ago

7 0

Your answer is 11
and to make sure all you would have to do is multiply 11 x 11 which equals 121

Dmitry_Shevchenko [17]2 years ago

6 0

The correct answer is 11

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What is the sum of the geometric sequence -3, 18, -108, ... if there are 8 terms

creativ13 [48]

Answer:

Step-by-step explanation:

common ratio=18/-3=-108/18=-6, a=-3

sn=a(r^n-1)(r-1)

sn=-3((-6)^n-1)(-6-1)

sn=-3(-6)^8-1)/(-7)

s8=-3(1679615)/(-7)

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2 years ago

58 = 7/4x well, basically I am really bad with fractions, and I'm supposed to do this on a computer, I don't have a calculator I

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58=7/4x
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2 years ago

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Step-by-step explanation:

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1 year ago

Write the following numerals in words 7,350,023 200,463 21,000,000

pogonyaev

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3 years ago

Read 2 more answers

Solve the question on the picture if it is wrong

romanna [79]

Given:

Cost of 1 digital song = $1.05

Cost of 2 digital song = $2.10

Cost of 5 digital song = $5.25

To find:

The equation and the cost of 25 downloaded digital songs.

Solution:

Let us take two points (1, 1.05) and (2, 2.10).

Here $x_1=1, y_1=1.05, x_2=2, y_2=2.10$

Slope:

$$m=\frac{y_2-y_1}{x_2-x_1}$

$$m=\frac{2.10-1.05}{2-1}$

m = 1.05

Using point-slope formula:

$y-y_1=m(x-x_1)$

$y-1.05=1.05(x-1)$

$y-1.05=1.05x-1.05$

Add 1.05 on both sides, we get

$y=1.05x$

Here x is the independent variable and c is the dependent variable.

So that substitute x = n and y = c.

$c=1.05n$

The equation is c = 1.05 n.

Substitute n = 25 in the equation.

$c=1.05(25)$

$c=26.25$

The cost of 25 songs is $26.25.

8 0

2 years ago