Mathematics High School

What is the sum of the first five terms of a geometric series with ay = 20 and
r= 1/4?

What Is The Sum Of The First Five Terms Of A Geometric Series With Ay = 20 Andr= 1/4?

Answers

Answer 1

Answer:

Step-by-step explanation:

What is the sum of the first five terms of a geometric series with a1 = 20 and r= 1/4?

For a Geometric series, the sum S, is given by  

s=a_1 ((1-r^n)/(1-r))

a=20 ,      n=5,         r=1/4

s=20((1-〖(1/4)〗^5)/(1-1/4))=26 2/3

Related Questions

I need help worth 20 points ​

Answers

Answer:

a

Step-by-step explanation:

3,6,10,5, 16,3,6

Mean is 7
Median

what’s the median? and is the mean correct?

Answers

Answer:

Mean:7 Median:6

Step-by-step explanation:

Okay so the Median is 6, and the mean is correct.

Median:

3, 3, 5, 6, 6, 10, 16.

Your median is 6.

Mean:

Yes, your mean is 7.

Example:

I will put an example on median and mode below this so you can see how you were right and how I got the median.

Step-by-step explanation:

                                                    MEAN

First, add all the values together and divide by the number of values in the set. Imagine 3 people donated money to red cross. Their names are Allisa, John, and Thomas. Allisa gave 20 dollars, John gave 35, and Thomas gave 20. Next, you add the amount of money they donated, which is 70. Then you divide 70, the amount of money, by 3, because thats the amount of people that donated. Then you get a mean of 23.

To put it simpler,

add the values.

then, add the amount of whatever carries that value, such as people.

after, you devide the value and the amount of people or etc.

when you finish, your mean will be what you have divided.

Another example would be this.

There are several whales out in the ocean. One is the Cuvier's beaked whales, which can swim as deep as 2,992 m. Another whale, named the sperm whale, can swim down to at least  1,000 m.

So, what is the mean?

Once again, first, we add the value, which in this case, is how deep the whales can dive. We then get 3992 m.

Next, we add the amount of whatever carries that value, which in this case are whales.

after, you devide the value by the amount of whales.

when you finish, you will get 1996

                                                    MEDIAN

Arrange your numbers in numerical order. If they were scrambled like this, 9, 7, 3, 9, 6, 1, 5, rearrange them like this. 1, 3, 5, 6, 7, 9, 9.  

When you do this, check how many numbers are in that row. In this case, the amount is 7, which is odd.

If you have an odd number like in the example above, select the number in the middle, which in our case, its 6. ( 1, 3, 5, 6, 7, 9, 9 )  So your median would be six, since median means "the middle number"

If you have an even number, add them together then divide by 2. Heres an example. 1, 3, 5, 6, 7, 9, 9. (1, 3, 5, 8, 12, 9, 9, 12) You would add 8 and 12. Your answer would be 20. So now, you divide 20 by 2. 20 divided by 2 is 10, so your median would be 10.

I did not plagerise this, I made these example up myself and solved them the way they are supposed to be and used these examples on another question similar to this.

Please help!

Thank you!

Answers

Answer:

x=3, y= -4

Step-by-step explanation:

Solve for x on the interval [0, 2pi]
Sinx = cosx + 1

Answers

Answer:

π

Step-by-step explanation:

Solve for x on the interval [0, 2pi]

Given the equation

Sinx = cosx + 1

Square both sides of the equation

Sin²x = (cos x + 1)²

Sin²x = cos²x + 2cos x + 1

Since Sin²x = 1 - cos²x

1 - cos²x = cos²x + 2cos x + 1

Collect like terms

1-1-cos²x-cos²x-2cos x  = 0

-2cos²x-2cos x = 0

-2cos²x = 2cos x

-cosx = 1

cos x = -1

x = arccos -1

x = 180 degrees

Hence the value of x = π

HELP IM BEING TIMED 20+ points!!

Determine if each situation creates a positive or a negative result.

Answers

Answer:

1: +

2: +

3: -

4: +

5: -

6: -

Step-by-step explanation:

hope this helps!

Vicky is 12 years old and has a little brother. Which inequality represents y, the age of Vicky's younger brother?

y 12
y ≤ 12

Answers

Answer:

y ≤ 12

Step-by-step explanation:

Answer:

y <12 the alligator always goes to the bigger pray that is how I learned it and she has a younger brother so that is what I say

What is the slope in this equation?
2x + 4y = 12

Answers

The answer is A)-1/2

ILL GIVE BRAINLY IF ITS RIGHT!!! PLSSS I NEED HELP ASAP
What is the rate of change between the two order pairs (3,6) and (5,7)
2
1/2
-2
4​

Answers

Answer: 1/2

Step-by-step explanation:

1/2 is the answer run the Brainly

y= 5/3X + 2/3
y = x +4

How do i simplify this ?

Answers

Answer:

i think its (-5,8) + (2,4)

Step-by-step explanation:

If it is a system of equations set the two equal to each other.
5/3x+2/3=x+4
-x. -x
2/3x+2/3=4
-2/3. -2/3
2/3x=3 1/3
X=5
Y=(5)+4
Y=9
(5,9)

Please help due in 5 minutes

Answers

Answer:

(-1,-2)

Step-by-step explanation:

There is a solution where the two expressions intersect. We can plug in what we know in the first equation in the second.

x= -1

y=3x+1

y= 3(-1)+1

y= -3+1

y= -2

Plugging y value in the equation to find x:

-2=3x+1

-3=3x

x= -1

Therefore, the point is (-1,-2)

I hope this helps! :)

Answer: B

(-1, -2)

x = -1, y = -2

<
>
Which of these expressions is equivalent to 3 (- 2) ?
Select the correct choice.
A
30 – 6
B
3.1 – 2
С C
33 + 2
D
32 +6

Answers

It’s b because neneksksjdbdjdjs ion know the explanation

Answer:

b and x =3(-2)=3(-(4)/(3))-2

Step-by-step explanation:

i hoped  helped :) <3

I NEED HELP FAST PLS HELP

Answers

Answer: c

they can all be multipled by 5

Step-by-step explanation:

if you get 24 dollars ever week and you save 2/3 of it how much have you been saving i need help please

Answers

Answer:

I believe your answer is 16

Answer:

Step-by-step explanation:well it depends how many weeks you saved it for? So if a teacher wrote that on a test tell her what I told you

Find the least common multiple​ (LCM) for 45,2

Answers

Answer:

90

Step-by-step explanation:

The LCM of 2 and 45 is 90.

the answer is 90 hope it’s right

composition of functions: perform the indicated operation

g(x) = 4x – 4
f(x)= - 2x

Find (g*f)(x)

A. -8x^3-12x-2

C. -8x+8

B. -8x-4

D. 8x+8​

Answers

Answer:

c

Step-by-step explanation:

Answer:

look at explanation.

Step-by-step explanation:

Answer is C.

Before conformation of my answer once prefer to math teacher.

help please it's math 15 pts!

Answers

Answer:

x= water bottles y=cost

Step-by-step explanation:

Being that there isn't a graph, generally the top is x and the bottom is y

If the graph was there.

Order -8, 9, -3, 6, -10, and 2 from least to greatest.​

Answers

Answer:

-10, -8, -3, 2,6,9

will you be my friend

Answer:

-10, -8, -3, 2, 6, 9

Step-by-step explanation:

Hope this helps!

The area of a rectangular pool deck is 168 feet the length is 14 feet what is the width of the pool deck

Answers

Answer:

12 ft

Step-by-step explanation:

Area = Length * Width

168 = 14 * W

168/14 = W

W = 12 ft

To watch a varsity basketball game, spectators must buy a ticket at the door. The cost of an adult ticket is $3.00 and the cost of a student ticket is $1.50. If the number of adult tickets sold is represented by a and student tickets sold by s, which expression represents the amount of money collected at the door from the ticket sales

Answers

Answer:

x = 3.00a + 1.50s

Help with number 5 (c,d) pleaseee!!!

Answers

D because of the input to the square radius of the units three squares over t the right

2x-3y=8
2x+3y=4. Please show your work and tell me how you go the answer

Answers

quick question is the 1 2 3 4 and 5 the answer options?

To find x you replace the y with a 0 and solve and to find y you replace the x with a 0

A company sells fruit cups in packs of 4. The packs currently weigh 20 oz. The company plans
to reduce the weight of each cup by n oz. The expression 20-4n represents the new weight, in
ounces, of a pack of fruit cups. Rewrite the expression for the new weight as a product of two
factors. Show your work, this can be typed into the text box.

Answers

Answer:

The weight as a product of two factors is 4(5 - n)

Step-by-step explanation:

Factoring

The expression 20 - 4n represents the new weight in ounces of a pack of fruit cups.

We can factor the binomial by finding the Greatest Common Factor of 20 and 4n.

Factoring out 4:

20 - 4n = 4(5 - n)

The weight as a product of two factors is 4(5 - n)

Make x the subject of the formula: y = x + 2a

Answers

Answer:

x=−2a+y

Step-by-step explanation:

Answer:

x=−2a+y

Step-by-step explanation:

Image attached with 30 points :).
express x^2 + 4x - 7 in the form....

Answers

Answer:

Hope that helps

Step-by-step explanation:

solve this 2 step equation
-2p + 12 > 8

Answers

Answer:

p<2

Step-by-step explanation:

The answer is 2(-p+6)

Suppose a city with population 400,000 has been growing at a rate of 6% per year. If this rate continues, find the population of this city in 16 years. The population in 16 year will be approximately...? ​

Answers

Answer:

784,000 people in total

Step-by-step explanation:

Please can you tell me how much each balance show

Answers

This graph is showing 105.6 grams

Which expression is equivalent to 10 - 8?
A) 10+8
B) 8-10
C) 10-(-8)

Answers

10-8=2
10+8=18
8-10=-2
10-(-8)=18
and you’re looking for an equation that equals to 10-8 which equals 2 and none of them equal 2. so it’s neither
None of them. They are all wrong.


Help please!!!!!
Geometry

Answers

Answer:

We just finished this in geometry and i hated it lol but i think <DBA and <CBA are equal and AD=AC

Can y’all help pretty please?
Gives 15 points

Answers

Answer:

It's answer is d

[tex]t \: = \frac{q}{mc} [/tex]

Hope it will help :)

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