Given the sequence, 26, 13, 6.5, ..... find a) the 10th term and b) the sum of the first 18 terms X Clear * Undo Redo ​

Answers

Answer 1

Answer:

[tex]T_{10} = 0.05078125[/tex]

[tex]S_{18} = 51.9998016358[/tex]

Step-by-step explanation:

Given:

Sequence = 26, 13, 6.5 ....

Solving (a): The 10th term

The sequence is a geometric progression and the nth term will be solved using:

[tex]T_n = ar^{n-1}[/tex]

In this case:

[tex]n = 10[/tex]

[tex]r = \frac{T_2}{T_1}[/tex] --- Common Ratio

[tex]r = \frac{13}{26}[/tex]

[tex]r = 0.5[/tex]

[tex]a = 26[/tex] --- First term

So, [tex]T_n = ar^{n-1}[/tex] becomes

[tex]T_{10} = 26 * 0.5^{10-1}[/tex]

[tex]T_{10} = 26 * 0.5^{9}[/tex]

[tex]T_{10} = 26 * 0.001953125[/tex]

[tex]T_{10} = 0.05078125[/tex]

Solving (b): The sum of first 18 terms

This will be calculated using:

[tex]S_n = \frac{a(1 - r^n)}{1 - r}[/tex]

Substitute values for n, a and r

[tex]S_{18} = \frac{26 * (1 - 0.5^{18})}{1 - 0.5}[/tex]

[tex]S_{18} = \frac{25.9999008179}{0.5}[/tex]

[tex]S_{18} = 51.9998016358[/tex]

Hence, the sum of first 18 terms is 51.9998016358


Related Questions


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Answer:

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Step-by-step explanation:

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Answer:

answer to 3 is

Step-by-step explanation:

1 hour = 0.7

2 hours = 1.4

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Step-by-step explanation:

Answer:

[tex]1.270[/tex] × [tex]10^{3}[/tex]  

I hope this helps!

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Answers

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These types of binomials are called conjugates.

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Answer:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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Answers

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Step-by-step explanation:

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Answers

Answer and Step-by-step explanation:

8. HL theorem - Has a right angle and the legs.

9. ASA - Angle A is congruent to angle B because of interior angles theorem, side AM is congruent to side MB because of midpoint theorem, angle AMC is congruent to angle BMD because of vertical angles theorem.

10. SSS - The two sides are congruent, and the hypotenuse is shared, making it congruent.

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9. SAS congruence rule

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Answers

Answer:

answer is x=4 I'm pretty sure

Step-by-step explanation:

I used a calculator

Answer:

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Step-by-step explanation:

If you plug 4 in, 4-4=0 and the absolute value will not change anything.

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Answers

Answer:

x = 0

Step-by-step explanation:

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-2 x 0 = 0

0 + 7 = 7

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Answer:

1.5

Step-by-step explanation:

If Sally makes $7.25 / hour and works 40 hours plus 8 hours overtime what will she get paid?

Answers

Answer:

$348

Step-by-step explanation:

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Answers

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Answer:

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Step-by-step explanation:

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Answers

Answer:

$0.05

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

Answer:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

Answer:

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Step-by-step explanation:

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Answers

Answer:

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Step-by-step explanation:

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Answers

Answer:

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Step-by-step explanation:

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The angle is defined as the span between two intersecting lines or surfaces at or close to the point where they meet. The supplementary angle is defined as the angle having the sum of 180 degrees.

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for the fourth select option:
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Answers

Answer:

1.) ML

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3.) include

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Answers

Answer:

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Step-by-step explanation:

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Answers

Answer:

13.81 in

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Answers

Answer:81%

Step-by-step explanation:

Answer:

60% tiger trout

Step-by-step explanation:

First, do 22+18=  40

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Answer:

Its the top right one

Step-by-step explanation:

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Answers

Answer:

1 11/15

Step-by-step explanation:

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Answers

Answer:

By combining like terms, we have 16x + 18

Step-by-step explanation:

Here, we want to combine like terms

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Answers

Answer:

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The graph representing the volume of water in the pool over time is illustrated in the graph.

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The problem can be presented by a simple linear equation:

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y is the amount of water in x hours

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b is the initial amount of water

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Answers

Answer:

1

Step-by-step explanation:

Answer:

(2/5,0)

Step-by-step explanation:

The equation to find a line is mx+b=y. In this case m is 5, and b is -2.

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Answers

Answer:

22:78

Step-by-step explanation:

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Answers

Answer:

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Step-by-step explanation:

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Which of the
following represents
this graph?
A. y = (x+11
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c. y = xl-1
D. y = |x|+1

Answers

Answer:

A. y=|x+1|

Step-by-step explanation:

what I like to use when figuring these out(mainly for homework) is a website called Desmos. You basically just plug in whatever equation/expression in and it will graph it for you. My Algebra teacher even allows me to. So all I did was plug in each equation until it matched the graph presented. Hope this helps!

The equation represented by the graph is y=|x+1|

How to determine the equation?

The equation is an absolute value graph

The parent function of an absolute value graph is:

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The above function is shifted to the left by 1 unit.

This transformation is represented by y=|x+1|

Hence, the equation represented by the graph is y=|x+1|

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Suppose your family spent​ $2438.67 on home energy last year. Estimate the amount spent on heating and​ cooling, rounded to the nearest hundred.

Answers

Answer:

The answer is "1200".

Step-by-step explanation:

The percentage value for [tex]\frac{heating}{cooling}= (48 \% )[/tex]

So,

[tex]\to 2438.67 \times \frac{48}{100} \\\\\\\to 117,056.16 \times \frac{1}{100}\\\\\to 1170.5616\\\\[/tex]

rounding the value into the nearest hundred =1200

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