Answers
Answer:
The second summation, counting from the top.
Step-by-step explanation:
Remember the relation:
[tex]a^{-n} = \frac{1}{a^n}[/tex]
The first summation is:
4*( (-1/2)^0 + (-1/2)^1 + (-1/2)^2 + (-1/2)^3)
4*( 1 - 1/2 + 1/4 - 1/8) = 2.5
Now let's analyze the options.
Let's look at option A, here we only have 2 to different powers, so we never can have a summation equal to 2.5, then we can discard that option.
Let's look at the next one (B), it will be equal to:
= (1/4)*( (-2)^4 + (-2)^3 + (-2)^2 + (-2)^1) =
= (1/4)*( 16 - 8 + 4 - 2) = 2.5
Then this summation is the one equivalent to the first one.
Answer:
B
Step-by-step explanation:
edg 2021
Related Questions
Charlotte is making 20 flower bouquets 4/5 of the bouquet are daisies and the rest are tulips how many bouquets are tulips
Answers
Answer:
4 bouquets
Step-by-step explanation:
5/5 = 20 flower bouquets.
Find out how much flower bouquets there are when it's 1/5.
5/5 = 20
1/5 = 20 ÷ 5 = 4
Since tulips are 1/5 as 5/5 - 4/5 = 1/5, 4 bouquets are tulips.
Find the equivalent measure of -110 .
Answers
Answer:
110
Step-by-step explanation:
a clothing store sells t-shirts,t,for $8 a shirt, and shorts,s,for $12 each. the store earned $180 revenue last month.the store sold three times as many t-shirts as shorts. using the method of substitution, how many t-shirts and shorts did did the store sell?
Answers
Answer:
Let x be the variable for a t-shirt for $8.
Let y be the variable for shorts for $12.
Let z be the variable for the hats that cost $10 each.
We have the expression 1 below:
$464 = $8x + $12y + $10z
other expressions:
3z = x
2z =y
By substitution we can solve each variable:
464 = 8(3z) + 12(2z) + 10z
464 = 24z +24z +10z
464 = 58z
z = 8
Solve for x andy:
3z=x
3*8 = 24=x
2z=y
2*8 = 16 = y
The t-shirts are 24 pieces, the shorts are 16 pieces and hats are 8 pieces.
Step-by-step explanation:
A dance floor is in the shape of a rectangle. It is 27 meters long and 16 meters wide. What is its peremeter?
Answers
Answer:
perimeter of a rectangle = 2(l+b)
length = 27 m
breadth = 16 m
perimeter = 2( 27+16 )
= 2 * 43
∴ perimeter = 86 m
hope this answer helps you.....
Answer:
86
Step-by-step explanation:
P= 2*W + 2*L
Therefore you get 86
The graph of g(x)=6+log3x is the graph of f(x)=log3x shifted...
Answers
Answer: graph is shifted 6 units upward, in positive y direction
Step-by-step explanation: 6 is added to every value of log(3x) .
BRAINLIEST FOR CORRECT ANSWER ASAP PLEASE
Answers
Answer:
he is correct because you add the exponents and then multiply 3 by itself that many times
Algebraic expression for 2x$7
Answers
Answer:
x=3.5
Step-by-step explanation:
Seven divided by Two equals three, and a half.
Answer:14
Step-by-step explanation:do 2*7=14
What is 24 1/2 - 9 7/8?
Answers
Answer:
the answer is 12 I hope this answer helps you
We have calculated a confidence interval based upon a sample of n = 200. Now we want to get a better estimate W with a margin of error only one fifth as large. We need a new sample with n at least
Answers
Answer:
::::::::::::::::::::
40
I need help on these problems because I don’t really get it
Answers
Simply the equation till you get something that looks like Y=X+5 (or any number)
Then plug in the X into your equation
HELP 10 mins left HELP HELP
The graph shows the time spent by students A through H on their homework assignments. Which student spent the least amount of time per assignment
A) a
B) d
C) g
D) h
Answers
Answer:
Student H
Step-by-step explanation:
He did the most amout of assiments in the least amout of time
Answer:
Student G
Step-by-step explanation:
They did 7 assignments in 8 hours, while student B did 3 in 8 hours
I think
Explain how to find the mean using the first model.
Answers
Answer:
Im not sure if this helps but the Mean is when you add all of the number together.
Step-by-step explanation:
on the question your doing is 1 to 10.
you add 1+2+3+4+5+6+7+8+9+10=55
your mean would be 55
find the value of x
pls help me!!
Answers
Answer:
[tex]x = 36[/tex]
Step-by-step explanation:
[tex]3x + x + x = 180[/tex]
[tex]5x = 180[/tex]
[tex]x = 36[/tex]
Which describes money that is received from a sale of goods or services?
O A. Benefit
O B. Cost
C. Revenue
O
D. Asset
SUBMIT
Answers
Mariner Middle School has 550 students the height of each student is measured and recorded at the beginning of the year . A school health class organizes the raw data into 6 equal height intervals would a dot plot
Answers
Answer:
C) A histogram because the class organizes the data into different ranges or intervals.
Step-by-step explanation:
A histogram is a graphical representation of numerical data. It is an approximate approach that groups a set of data into ranges on the x axis and having their match frequencies on the y axis.
A histogram makes it possible to represent a large amount of data and frequency in just one graph because of the interval/range option.
Because Mariner Middle school has a large number of students (550) and their height organized into equal intervals, the histogram is the best option.
i need help with this problem x^2+2x-36=2x
Answers
which line has a slope of -1/2?
A.) line d
B.) line c
C.) line b
D.) line a
Answers
Answer:
C) line d
Step-by-step explanation:
Line D’s slope is -1/2, so C is the correct answer.
What’s the answer to this, help plzzzzz
Answers
Place the following objects in order from greatest to least gravitational force. Explain your answer.
*Earth
*DISCOVER satellite
*Sun
*Moon
Answers
well when thinking of gravity you have to think of the size and mass of the object so,
The sun (largest and most mass)
Earth
Earth's moon
Discover satellite (cause it's tiny and light compared to the sun!)
PLS HELP: A box is 9 inches wide, 3 inches long, and 12 inches high. It is completely filled with blocks that are each 1 cubie inch in volume. If 20 blocks were taken out of the box, how many blocks would remain in the box?
Answers
Answer: 304
Step-by-step explanation: first you multiply 9, 3, and 12 which equals 324. Then you subtract 20 from 324 and you get 304.
Solve the inequality: x^6 - 64 > 0
Please help ASAP!!! Thank you!!!
Answers
Step-by-step explanation:
Step-by-step explanation: Here's your solution
Step-by-step explanation: Here's your solution=> x^2 - 64 > 0
Step-by-step explanation: Here's your solution=> x^2 - 64 > 0 => x^2 > 64
Step-by-step explanation: Here's your solution=> x^2 - 64 > 0 => x^2 > 64 => x = 6√64
=. x = 2
hope it helps
Blackcap birds (Sylvia atricapilla) migrate out of Germany before wintertime. Prior to the 1960s, all members of a particular blackcap population flew to Spain, which had an abundant natural food source. Now, some members of the same blackcap population fly to the United Kingdom, where food placed in feeders by humans is abundant. The blackcaps return to the same forests in Germany to nest during the breeding season.
Some blackcaps that migrate to the United Kingdom have become distinguishable by certain physical and behavioral traits from blackcaps that migrate to Spain. Which of the following best predicts the effect on the blackcap population if humans in the United Kingdom continue to place food in feeders during the winter?
A- The blackcaps that migrate to Spain will selectively mate with the blackcaps that migrate to the United Kingdom, resulting in increased genetic variation in the blackcap population.
B- The blackcaps that migrate to the United Kingdom will become reproductively isolated from the blackcaps that migrate to Spain, resulting in speciation in the blackcap population.
C- The blackcaps in Spain and the United Kingdom will migrate to other geographical locations in search of potential mating partners, resulting in a smaller blackcap population in Germany.
D- The blackcaps will begin nesting at their wintering sites in Spain or the United Kingdom, resulting in a larger blackcap population migrating back to Germany after the breeding season has ended.
Answers
Answer:
D- The blackcaps will begin nesting at their wintering sites in Spain or the United Kingdom, resulting in a larger blackcap population migrating back to Germany after the breeding season has ended.
Step-by-step explanation:
By the inhabitants of Spain and the United Kingdom placing feeders out for the blackcaps, the birds in their nesting sites during the winter will have food to eat, meaning a bigger population of the Blackcaps when they return to their main home in Germany.
This best predicts the effect on the blackcap population if humans in the United Kingdom continue to place food in feeders during the winter.
what is 513 + _ + 130 = 764? what is the missing number and can u pls do a explantation
Answers
Answer:
121
Step-by-step explanation:
The missing number is 121. I got this by doing 764-130-513=121. You would do this because you are trying to find the number that would allow 130 and 513 to add up to 764.
Another way to look at this problem is 513+130= 643
764-643=121
In conclusion, 513+121+130=764
Answer:
the answer will be 121
Step-by-step explanation:
because 513 + 130= 643 then 121 + 643 = 764
Solve, using a proportion. If Joe travels 434 miles in 7 hours, how far will he travel in 10 hours at the same speed? miles Enter
Answers
Answer:
Step-by-step explana
Answer:
Step-by-step explanation:
What is the answer
What is the percent of decrease for a t.v. that went from $200 to $125. Round to your nearest percent.
Answers
Answer:69+69=420
Step-by-step explanation:h
A scale drawing used for the model of a building is 1 inch = 150 feet. How tall is the building if the scale model is 6 inches tall?
Answers
Answer:
900
Step-by-step explanation:
1 inch/150 feet x 6 inch/x feet
cross multiply
1x=900
Emma earns $12 an hour babysitting. She wants to save at least $180. Write and solve and inequality to find the minimum number of hours she needs to work to reach her goal.
Answers
Answer:
15 hours
Step-by-step explanation:
180 ÷ 12 = 15
^-^
Can I have brainlest please?
What is 9 1/2 plus 12 11/20
Answers
Answer:
[tex]22\frac{1}{20}[/tex]
Step-by-step explanation:
mark me Brainllest
Answer:
Exact Form: 441/20
Decimal Form: 22.05
Mixed Number Form: 22 1/20
What transformation has changed the parent function f(x) = (.5)* to its new
appearance shown in the graph below? (1 point)
Answers
Answer:
Vertical compression by a factor of ¼Step-by-step explanation:
[Transformed] f(x) = ¼(.5)ˣ
[Original] f(x) = (.5)ˣ
____________________
I determined this transformation by comparing the notable points on the graph.
When x = -2 for the original function f(x), y = 4.
For this transformed graph y = 1 instead of 4.
Therefore y is scaled by ¼, and so that is the vertical compression.
In a manufacturing process, the assembly line speed (feet per minute) is believed to affect the number of defective parts found during the inspection process. Data (File 3) are collected on the number of defective parts for a variety of line speeds. Develop a linear regression equation that can be used to predict the number of defective parts given the line speed.
Line Speed Number of Defective Parts Found
20 21
20 19
40 15
30 16
60 14
40 17
Required:
a. Develop a scatter chart with line speed as the independent variable. What does the chart indicate about the relationship between line speed and the number of defective parts found?
b. Use the data to develop an estimated regression equation that could be used to predict the number of defective parts found, given the line speed. What is the estimated regression model?
c. Test whether each of the regression parameters βo and β1 is equal to zero at 0.01 level of significance. What are the correct interpretations of the estimated regression parameters?
d. How much of the variation in the number of defective parts found for the sample data does the model you estimated in part (b) explain?
Answers
Answer:
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