Answer:
5
Step-by-step explanation:
Help me ASAP please !!!! I attached a pic
Даны векторы "а" ⃗ (10;2)и "b" ⃗ (1;-1). Выполните действие над векторами:
а) 0,5"а" ⃗+ 5b ⃗
б) "а" ⃗- b ⃗
в) "а" ⃗+ b ⃗
применяет правила сложения векторов
применяет правила вычитания векторов
применяет правило умножения вектора на число
СРОЧНО ПЖ СОР
Answer:
he is the number of people
Use the word SCHOOL to answer this question.
If the letters of this word were written on paper and then cut into squares with one letter
per square, what is the probability of this event?
P(consonant)
1
3
1
2
1
6
2
3
Answer:
2/3
Step-by-step explanation:
4/6 * 100% = 66.66% = 2/3
Taylor uses 32 buttons for every 4 blouses she sews.
What is the ratio of blouses to buttons?
Answer:
1:8 , 1/8
Step-by-step explanation:
4 blouses / 32 buttons
= 1 blouse / 8 buttons
(4 and 32 share a GCF of 4)
Answer:
I think it would be 1 to 8
Step-by-step explanation:
32 divided 4 equals 8. So for every 1 blouses she uses 8 buttons. So the ratio would be 1( blouse )to 8(buttons).
A college Statistics class conducted a survey concerning community attitudes about the college's large homecoming celebration. That survey drew its sample in the following manner: Telephone numbers were generated at random by selecting one of the local telephone exchanges (first three digits) at random and then generating a random four-digit number to follow the exchange. If a person answered the phone and the call was to a residence, then that person was taken to be the subject for interview. (Undergraduate students and those under voting age were excluded, as was anyone who could not speak English.) Calls were placed until a sample of 200 eligible respondents had been reached.
Required:
a. Did every telephone number that could occur in that community have an equal chance of being generated?
b. Did this method of generating telephone numbers result in a simple random sample (SRS) of local residences? Explain.
c. Did this method generate an SRS of local voters? Explain.
d. Is this method unbiased in generating samples of households? Explain.
Answer:
A) Yes
B) No
C) No
D) No
Step-by-step explanation:
A) Yes, every telephone number that could occur in that community will have an equal chance of being generated because the telephone numbers were generated randomly.
B) No, this method of generating telephone numbers would not result in a simple random sample (SRS) of local residences because the first three digits were generated in a different random way than the last four digits.
C) No, this method would not generate an SRS of local voters because not everybody will be pick up when they call because they may not be at home or they may be too busy to pick up.
D) No, this method is not unbiased in generating samples of households because there will be nonresponse bias since not everyone will pick up the call
A trail mix recipe includes granola, oats, and almonds. How many Calories are in 2 cups of trail mix?
Answer:
1,080 calories
Step-by-step explanation:
You can also use the method of direct proportion:
cups
calories
=
0.25
135
=
2
x
←
cross-multiply
0.25
x
=
135
×
2
x
=
135
×
2
0.25
x
=
1080
calories
Answer:
1,080 calories.
Step-by-step explanation:
135/1 ÷ 1/4
135/1 · 4/1
= 540/1 cup
540 calories · 2 = 1,080 calories
=1,080 calories in 2 cups of trail mix
A study of nutrition in developing countries collected data from the Egyptian village of Nahya. Researchers recorded the mean weight (in kilograms) for 170 infants in Nahya each month during their first year of life. A hasty user of statistics enters the data into software and computes the least-squares li~thout looking at the scatterplot first. The result is weight= 4.88 + 0.267 (age).
Required:
Use the residual plot to determine if this linear model is appropriate.
Answer:
The linear model is not appropriate.
Step-by-step explanation:
In regression, the difference amid the observed-value of the dependent-variable (y) and the predicted-value ([tex]\hat y[/tex]) is known as the residual (e).
[tex]e=y-\hat y[/tex]
A residual plot is a graphical representation of the residuals on the y-axis and the independent variable on the x-axis. If the data-points on the residual plot are randomly spread around the x-axis, a linear regression model is appropriate for the data. And if the residual plots shows a non-random or a U or inverted U pattern, a nonlinear model is more appropriate for the data.
The residual provided shown an inverted U pattern. That is the points are not scattered around he graph.
Thus, the linear model is not appropriate.
A residual plot for the nutrition data would display the residuals on the y-axis and the age on the x-axis.
The residual plot is not appropriate for a linear model.
From the residual plot (see attachment), we can see that the points on the residual plot follows a curved pattern.
For a residual plot to be a linear model, the points on the plot must be at random on the horizontal axis of the plot.
This means that, the residual plot is not appropriate for a linear model.
Read more about residual plots at:
https://brainly.com/question/2876516
An industrial/organizational psychologist is consulting with Family Practice Pediatrics, which has just lost several of its best doctors to a rival pediatric practice. The management at Family Practice would like to know what it can do to increase job satisfaction for its remaining pediatricians. The psychologist is trying to determine whether significant information will be lost if she surveys a subset rather than every single pediatrician at Family Practice.
The following table lists the job satisfaction scores for all eight pediatricians at Family Practice as well as four examples of possible four-pediatrician samples. At the bottom of the table, the variance listed in the second column for all eight pediatricians is the population variance for the eight pediatricians (that is, sigma^2 = SS/N = SS/8). The variances listed in the third through the sixth columns are the sample variances for each of the four-pediatrician samples (that is, s^2 = SS/(n - 1) = SS/3).
Pediatrician Satisfaction Sample 1 Sample 2 Sample 3 Sample 4
A 5 x x x
B 6 x x x x
C 8 x x x
D 3 x
E 7 x x
F 2 x
G 8 x x
H 9
Mean 6.00 6.75 6.50 5.25 6.00
Variance 5.50 2.25 1.67 6.25 4.67
What is the mean of the four sample means?
What is the mean of the four sample variances?
A sample statistic is_______ if the average value of the sample statistic, obtained over all possible samples, is equal to the population parameter.
A sample statistic is_______ if it consistently underestimates or overestimates the corresponding population parameter.
A sample mean (that is, M = sigma X/n) is_________ estimator of the population mean. A sample variance that is computed as s^2 = SS/(n - 1) is estimator of the population variance.
Complete Question
The complete question is shown on the first uploaded image
Answer:
What is the mean of the four sample means is [tex]\= x = 6.125 [/tex]
What is the mean of the four sample variances is [tex]\= x_v = 3.71[/tex]
A sample statistic is an unbiased point estimator if the average value of the sample statistic, obtained over all possible samples, is equal to the population parameter.
A sample statistic is biased if it consistently underestimates or overestimates the corresponding population parameter.
A sample mean (that is, M = sigma X/n) is unbiased estimator of the population mean
A sample variance that is computed as s^2 = SS/(n - 1) is unbiased estimator of the population variance.
Step-by-step explanation:
From the question we are told that
Mean 6.00 6.75 6.50 5.25 6.00
Variance 5.50 2.25 1.67 6.25 4.67
Generally the mean of the four sample means is mathematically represented as
[tex]\= x = \frac{6.00+ 6.75 + 6.50 + 5.25 + 6.00}{4}[/tex]
=> [tex]\= x = 6.125 [/tex]
Generally the mean of the four sample variances is mathematically represented as
[tex]\= x_v = \frac{5.50+ 2.25+ 1.67+ 6.25 +4.67}{4}[/tex]
=> [tex]\= x_v = 3.71[/tex]
2) Martha cut three pieces of rope that are 5 1/4 inches each from a rope that is 20 inches
long. What is the length of the remaining part of the rope?
Help me please
Answer:
Step-by-step explanation:
Total length of the rope = 20 inches.
Martha cuts 3 pieces of rope that is 5 1/4 inches each.
Find the total length of the 3 pieces of rope:
Total of 3 pieces of rope = 5 1/4 + 5 1/4 + 5 1/4 = 15.75
Since we know the total rope length is 20 inches, if you subtract the total length of the 3 pieces of rope you will get the remaining length of rope.
Remaining length = 20 - 15.75
= 4.25 inches of rope
need help..................
Answer:
The answer is D
Step-by-step explanation:
(4x6)^3
(24)^3=13,824
when you multiply 4^3 with 6^3 you get the same answer of 13,824
Answer:
Answer=D
Step-by-step explanation:
(for powers outside a bracket it splits in the numbers inside the bracket)
(4×6)^3
=([tex]4^{3}[/tex]×[tex]6^{3}[/tex]) as in D
To proof
-if we multiply them first we will get 24 and that to the power of three will equal to 13824.
-if we did as in the answer so,
[tex]4^{3}[/tex]×[tex]6^{3}[/tex]
=64×216
=13824
they are equal to each other 13824=13824 so answer D is correct.
HEEEEEELP PLZZZZZ I NEEED IT LIKE NOW
For a field trip 23 students rode in cars and the rest filled five buses. How many students were in each bus if 288 students were on the trip?
Answer:
288 (DIVIDED) by 23=
12.5217391304 ROUNDED UP=
About 13 students per bus.
What is the correct answer? please
2 to the 8th power multiplied by 2 to the 4th power
Answer:
4096
Step-by-step explanation
Do 2×2×2×2×2×2×2×2 to get 256
Then do 2×2×2×2 to get 16
Lastly do 256×16 to get a grand total of 4096
Help ! This is a different one
Answer:
[tex]this \: probability \: is \: \frac{8}{10} = \frac{4}{5} [/tex]
Answer:
B. 4/5
Step-by-step explanation:
hope this helps :3
if it did pls mark brainliest
how to rotate a triangle 90 dagrees clockwise?
Answer:
Turn it 90 degrees left or right, basically turn it left or right until it is sideways
what is the measure of angle BCD?
Step-by-step explanation:
here is my step by step so first you look at the two inner angles which in this case are B and C then you multiply them together to get your angle D.
Answer:
A.) obtuse angle
B.) 180 degrees
C.) 95 degrees
Step-by-step explanation:
C.) 80 - 85 = 95
can someone please help? i need to find the slope of a line. it’s for a test!
Answer:
Step-by-step explanation: To find the slope, you divide the difference of the y-coordinates of 2 points on a line by the difference of the x-coordinates of those same 2 points .
Answer:
The slope is 2/3
Step-by-step explanation:
The equation that the graph gives us is y = 2/3x + 3.
With this equation, we know that the slope is 2/3.
Bonus:
With this equation, we also know that the y-intercept is 3.
in the real world humans hear sound as an analog signal. this means the signal is a continuous waveform which is completely processable by human ears. however machines 'hear' sound a little differently as they process sound digitally which is a discrete waveform. when sound is recorded or transmitted electronically the continuous (analog) waveform is sampled to convert it to a discrete (digital) sequence. sampling is the process of reducing a continuous time signal to a discrete-time signal. as the sampling rate increases the sound quality of the recording or transmission will improve. the graphs below represent two different samples of pure tone. sample one is taken 8 times per unit of time. sample two is taken 16 times per unit of time. a) why would sample 2 reproduce a better replication of the pure signal? b) write a sinusoid model for sample 2
Answer:
y=7.75cos(pi/8(x)) + 7.75
Step-by-step explanation:
A= 15.5 - 0 = 15.5/2 = 7.75 (Max Y - Min Y)
P = 16-0 (Distance between Max x and next Max x)
F= Pi/8
Midline= 7.75
Vertical Shift = Midline = 7.75
Answer for A since the other person answered only B
Sample 2 would reproduce a better replication of the pure signal because it records more frequently, meaning that it would be closer to being a continuous waveform when compared to sample 1.
If it took 2 hours to clean 5 houses, how many houses could be cleaned in 6 hours?
Answer:
15 houses
Step-by-step explanation:
[tex]\frac{2}{5} = \frac{6}{y} \\[/tex]
2y = 30
y = 15 houses
Simplify the expressions by distributing and combining like terms 5/8x-2(7-1/4x)
Please help!
The access code to a houses security system consists of 8 digits. How many different codes are available if each digit can NOT be repeated?
Multiply. 4 2/7 x 2 1/5
A) 8 2/35
B) 8 1/7
C) 9 1/7
D) 9 3/7
The answer is D :)
hope this helps! <3
Answer:
D) 9 3/7
Step-by-step explanation:
4 2/7 × 2 1/5
=30/7 × 11/5
= 30 × 11/7 × 5
=330/35
=330 ÷ 5/35 ÷ 5
=66/7 = 9 3/7
Group Tens as Hundreds
Write how many tens. Circle groups of 10 tens.
Write how many hundreds. Write the number.
Answer:
Write how many groups of tens there are
Circle groups where there are ten groups of tens
Write how many hundreds there are
Write the total number of tens and hundreds there are
use a number line to solve the sum
2+5
Answer:
"7" Would be your answer.
Step-by-step explanation:
A school conducts 27 tests in 36 weeks. Assume the school conducts tests at a constant rate. What is the slope of the line that represents the
number of tests on the y-axis and the time in weeks on the x-axis?
А. 3/4
B. 4/3
C. 3
D. 4
Answer:
i think it would be 4 i'm not sure tell me if i'm wrong.
Answer:
a
Step-by-step explanation:
2
In science class, Graciela noticed that the balance scale showed 2 ounces for a sample of matter and 56.7
grams for the same sample. She has a rock that weighs 708.75 grams but needs to know the weight in
ounces. Which proportion could Graciela use to find x, the weight of the rock in ounces?
rls, what
F
56.7
708.75
2
56.7
2 2.
56.7
78.75
708.75
H
2
708.75
56.7
y mile
J
708.7
2
56.7
Answer:
Step-by-step explanation:
If the scale showed 2 ounces for a sample of matter and 56.7grams for the same sample, then;
2 ounces = 56.7grams
If She has a rock that weighs 708.75 grams but needs to know the weight in
ounces, we can say;
x ounces = 708.75grams
Combining both equality postulates
2 ounces = 56.7grams
x ounces = 708.75grams
Cross multiply
56.7 × x = 2 × 708.75
x = (2 × 708.75)/56.7
The proportion is (2 × 708.75)/56.7
Calculate x:
x = 1417.5/56.7
x = 25
Hence the weight of the 708.75g rock in ounces is 25ounces
The points (0.5,1/2) and (7,1 2/5) are on the graph of a proportional relationship what is the constant of proportionality name one more point on the graph write an equation that represents the proportional relationship
Answer:
wait do you have a picture of a graph so i can understand more correcctly
Step-by-step explanation:
Step 1: Select a two-digit number less than 100.
Step 2: Add 3 to your number.
Step 3: Double the result.
Step 4: Subtract 9.
Step 5: Multiply by 5.
Step 6: Add 15.
Step 7: Divide by 10
Did you get your original number? Use algebra to show why this works. How is
this problem different from the previous problem?
SOMEONE PLEASE HELPP MEEE!!!
Answer:
I'm unsure if this helps.
Step-by-step explanation:
step 1= 22
step 2= 25
step 3= 50
step 4= 41
step 5= 205
Step 6= 220
Step 7= 22
Anybody Know This. ?
Answer second option
Step-by-step explanation:
Answer:
the 2nd
Step-by-step explanation:
one is the one and only
Shakira is baking cookies to put in packages for a fundraiser. Shakira has made 86 chocolate chip cookies and 42 sugar cookies.
Shakira wants to create identical packages of cookies to sell, and she must use all of the cookies.
What is the greatest number of identical packages that Shaquira can make?
Answer:
she can make 42 identical packages
Step-by-step explanation:
Answer:
Assuming there can only be 2 cookies per identical package, She can make 42 identical packages which contains 2 chocolate chip cookies and 1 sugar cookie.
86 / 2 = 43 chocolate chips cookies
42 / 1 = 42 sugar cookies
With the sugar cookies not having the capability to match the requirements we will assume for this answer that an "Identical Package" is composed of 2 chocolate chip cookies, and a single sugar cookie.
-I hope this is the answer you are looking for, please feel free to post your questions of brainly.com in the future.