Answer:
41.81 ; 12.67
Step-by-step explanation:
Given the data:
Age range, years 18-28 29-39 40-50 51-61 62 and over
Midpoint x 23 34 45 56 67
Percent of super shoppers 9% 46% 22% 11% 12%
Midpoint, x : 23 34 45 56 67
Frequency, f : 0.09_ 0.46 _ 0.22 __0.11 __ 0.12
The mean(m)
Σfx / Σf
[(23 * 0.09) + (34 * 0.46) + (45 * 0.22) + (56 * 0.11) + (67 * 0.12)] / (0.09 + 0.46 + 0.22 + 0.11 + 0.12)
= 41.81 / 1
Mean = 41.81
Standard deviation :
Sqrt[(Σ(X² * f) / Σf) - m²)]
((23^2*0.09) + (34^2*0.46) + (45^2*0.22) + (56^2*0.11) + (67^2*0.12)) / 1
1908.51 - 41.81^2
Sqrt(160.4339)
= 12.666250
= 12.67
any help for math lesson
Answer:
12.5
Step-by-step explanation:
We can turn this into a cross - multiplication problem.
n / 7.5 = 25 / 15
All we have to do is cross multiply to get 15n = 7.5*25
As a result, we get 15n = 187.5
Divide by 15 on both sides to get 12.5
Double check
We can double check this answer by dividing 15/7.5 and 15/7.5, because ratios are the same if they are just multiplied versions of themselves
So, we get 2 for both answers, meaning that 12.5 is correct
Which is the equation of the line that passes through the point (-4,3) and (2,6)
Answer:
[tex]\displaystyle y = \frac{1}{2}x + 5[/tex]
Step-by-step explanation:
Equation of a Line
The point-slope form of the equation of a line is:
y - k = m ( x - h )
Where m is the slope and (h,k) is a point through which the line passes.
Suppose a line passes through points A(x1,y1) and B(x2,y2). The slope can be calculated with the formula:
[tex]\displaystyle m=\frac{y_2-y_1}{x_2-x_1}[/tex]
We'll use the points (-4,3) and (2,6), thus:
[tex]\displaystyle m=\frac{6-3}{2+4}=\frac{3}{6}=\frac{1}{2}[/tex]
Now we use the point-slope form using the point (2,6):
[tex]\displaystyle y - 6 = \frac{1}{2}( x - 2 )[/tex]
Operating:
[tex]\displaystyle y - 6 = \frac{1}{2}x - 1[/tex]
[tex]\displaystyle y = \frac{1}{2}x - 1 + 6[/tex]
[tex]\boxed{\displaystyle y = \frac{1}{2}x + 5}[/tex]
Help please! This is due in 5 minutes!
Answer:
b. 55
Step-by-step explanation:
x+90+y = 180 (Being angles of a traingle)
35+ 90+y = 180
125 + y = 180
y = 180-125
Therefore , y=55
2. Encuentra o solocion de la cocasion X²-x-30=0
Answer:
Step-by-step explanation:
Por aspa simple:
x²+x-30=0
X +6
X -5
(x+6)(x-5)=0
x+6=0
x=-6
x-5=0
x=5
espero te sirva suerte en tus estudios :D
The x intercepts
are ______
with the axis of symmetry. *
On
Above
Symmetric
Below
PLSS do dis...................UwU
A doctor wants to determine if a new medication for cholesterol is more effective than the previous medication. The doctor informs his patients of the new medication and asks if they want to participate in a study. Patients who are currently taking medication for cholesterol are randomly selected and given the new medication. After two months, the patients’ cholesterol levels are checked.
Which of the following would benefit this experiment the most?
A This experiment should also use the original medication to see if the patients’ cholesterol levels would improve because they believe they are receiving the new medication.
B This experiment should use blinding and a placebo, so patients do not know which treatment they are receiving and to control for the placebo effect.
C This experiment should be single blind, with some patients taking the new medication and some taking the original medication to determine the effects of the new medication. Only the subjects would not know which treatment they are receiving.
D This experiment should be double blind, with some patients taking the new medication and some taking a placebo to determine the effects of the new medication. Neither the subjects nor the technicians checking the cholesterol would know which treatment was given to which group.
Answer:
its option 3
Step-by-step explanation:
got 100% on it
Blinding and placebo should be used in this experiment to prevent patients from knowing which therapy they are receiving and to account for the placebo effect.
What is the placebo effect?A person experiences the placebo effect when their physical or mental health seems to get better after receiving a placebo or "dummy" treatment. A treatment that seems to be real but is intended to have no therapeutic benefit is referred to as a placebo.
Given, If a new cholesterol drug is more successful than the old one, a doctor wants to know. The doctor tells his patients about the new drug and inquires about their interest in taking part in a trial. Randomly chosen patients who are already receiving cholesterol medication are given the new drug. The patients' cholesterol levels are assessed after two months.
Treatments with placebos cause the brain to react in a real way. Belief in the efficacy of a treatment can cause the release of neurotransmitters, the synthesis of hormones, and immunological response, which can reduce the symptoms of pain, inflammatory diseases, and mood disorders.
Therefore, In order to keep patients from knowing which therapy they are taking and to take the placebo effect into account, blinding and placebo should be employed in this experiment.
Learn more about the placebo effect here:
https://brainly.com/question/29811617
#SPJ2
ROUND OFF 13.4625 TO THE NEAREST TEN THOUSANDTHS
Answer:
13.46
Step-by-step explanation:
the number after 6 is less than 5 so the number wont change
Help with question please!,
Answer:
I believe it is A. 1/6. But I may not be right.
Step-by-step explanation:
PLEASE ANSWER ASASP AND GIVE BRAINLEST!!!!!!!!!!!!!
The equation c = 2.5t represents the cost, c, for t tickets to the school play. Does a value of 3.5 for t make sense in this situation? Explain your reasoning.
Answer:
No
Step-by-step explanation:
Number of tickets can only be represented by integer values. A value of 3.5 for t would imply you can purchase three and a half tickets, which isn't possible.
EASY WORK!Plz look at the photo.
Answer:
1. >
2. =
3. >
4. <
5. =
6. >
7. <
What are the numbers in #8 and #9?
Step-by-step explanation:
need help asap pls!!!
Answer:
16
Step-by-step explanation:
According to the given description, PS is the mid segment of the [tex] \triangle TQR[/tex]
Therefore by Mid-segment Theorem:
[tex]PS = \frac{1}{2} QR \\ \\ PS = \frac{1}{2} \times 32 \\ \\ PS =16 \: [/tex]
-4=16x what would u do to solve this equation?
Answer:
x=-1/4
Step-by-step explanation:
-4/16=16x/16
-1/4=x
The graph shows the career interests of the students at Linda’s school. Suppose there are 400 students at the school. How many of them want to be an athlete? (Example 1)
Step-by-step explanation:
Percentage of students who want to be an athlete
= 12%.
400 students * (12%/100%) = 48 students.
Hence 48 students want to be an athlete.
The number of athletes students which are 12% of 400 students will be 48.
What is the percentage?The quantity of anything is stated as though it were a fraction of a hundred. A quarter of 100 can be used to express the ratio. Per 100 is what the term percent signifies. The symbol ‘%’ is used to symbolize it.
The percentage is given as,
Percentage (P) = [Final value - Initial value] / Initial value x 100
The graph shows the career interests of the students at Linda’s school. Suppose there are 400 students at the school.
From the graph, the percentage of athletes is 12%.
The number of athletes students which are 12% of 400 students will be given as,
⇒ 12% x 400
⇒ 0.12 x 400
⇒ 48
The number of athletes students which are 12% of 400 students will be 48.
More about the percentage link is given below.
https://brainly.com/question/8011401
#SPJ2
Which equation represents the relationship between x and y?
X
y
1
4
2
5
3
6
4
7
y = x + 1
y = x-3
y = x + 3
y = 3x + 1
Answer:
between x and y they represents y=3x+1
1+1+90+1000+=
YOu will get 70 points
Answer:
THe answer is 1092.
Step-by-step explanation:
1 + 1 + 90 + 1000
2 + 90 + 1000
92 + 1000
1092
Answer:
YEA!! THX
Step-by-step explanation:
(03.01)
The LCM of 3 and 7 is
(2 points)
A
Question 2 (6 points)
Answer:
The LCM of 3 and 7 is 21Step-by-step explanation:
I hope it helps ❤❤Answer:
The LCM of 3 and 7 is 21Step-by-step explanation:
I hope it helpsthe number of miles is always ? times the number of hours
please help this is iready
Answer:
10!
Step-by-step explanation: because 10,20,30,40 they each go by 10
Answer:
10
Step-by-step explanation:
50 POINTS IF YOU ANSWER!!
Determine which expression(s) is in its simplified form. Select all situations that apply.
x²/xy
12x/y
4x/32z
5z/xy
z^4/xyz
Answer:
I think it will be 12x/y
it must help you
Answer:
3 of them.
Step-by-step explanation:
x² /xy is in its simplified form as it is x/y
12x/y is in its simplified form
4x/32z is x/8z
5z/xy is in its simplified form
z⁴/xyz is in its simplified form
What is the greatest common factor of 43 and 81?
Answer: 43=1 81=3 Might not be right. Hope it is.
Marinella buys 5 pounds of white potatoesband 7/8 as many pounds of sweet potatoes how many pounds of sweet potatoes does she buy use paper to model the problem with the tape diagram in the boxes below expression answer as both a fraction greater than one and a mixed number
Write an equation that describes the function. Could someone help me out because I need to submit this asap.
Answer:
0*3=0
1*3=3
2*3=6
3*3=9
Step-by-step explanation:
Helpppp please pleasee
Capture the whole picture and repost with it's question. And only then any of us online can help. we ain't understanding the question cuz no question is even visible. sorry.
Make a paragraph about being a young writer. Put the paragraph in your own words. Please put the paragraph IN YOUR OWN WORDS.
100 points
Answer:
to me being a young writer means to have a burning passion for writing. when it comes to writing at a young age oh, that's the best time to be a writer because your imagination is so active it comes up with amazing ideas. I would like to share about when I started writing around the age of eight, I would write tons of stories about My Little Pony characters and the Monster High characters, sometimes even Adventure Time and I was always very detailed when it came to writing. around the age of 12 13 I started writing love stories, but I kept it PG, sometimes PG-13, but it was love stories about Creepypastas and stuff like that. I was a bit of a loser when it came to writing , to be honest I wish I would have kept writing but I stopped.
please answer asap!!!
Answer:
z = 66
Step-by-step explanation:
RS = z
QT = z - 33
Based on the midsegment theorem, QT = ½(RS)
Plug in the values
z - 33 = ½(z)
Multiply both sides by 2
2(z - 33) = z
2z - 66 = z
Add 66 to both sides
2z = z + 66
Subtract z from both sides
2z - z = 66
z = 66
I have no idea what to do pls help
Answer:
101 = first number
115= second number
101+115=116
101 and 115
yes they are odd because you can not add two nubers to make 101 or 115
yes. they do add up to 116.
Step-by-step explanation: hope this helped
could someone help me:)?
Answer:
It is -4
Step-by-step explanation:
Hope this helped have an amazing day!
Answer:
The answer is -4.
Step-by-step explanation:
I'm good at integers.
what is the answer to this ⅓(6x-9)
Answer:
3 - 2x
Step-by-step explanation:
Answer:
9-9x = 0 x=1
Step-by-step explanation:
Put each term in 6+(-9-6 x)/3-x over the common denominator 3: 6+(-9-6 x)/3-x = 18/3+(-9-6 x)/3-(3 x)/3:
18/3+(-9-6 x)/3-(3 x)/3 = 0
18/3+(-9-6 x)/3-(3 x)/3 = (-3 x+(-9-6 x)+18)/3:
(-3 x-6 x-9+18)/3 = 0
Grouping like terms, -3 x-6 x-9+18 = (18-9)+(-6 x-3 x):
((18-9)+(-6 x-3 x))/3 = 0
-6 x-3 x = -9 x:
(-9 x+(18-9))/3 = 0
18-9 = 9:
(9-9 x)/3 = 0
Multiply both sides of (9-9 x)/3 = 0 by 3:
(3 (9-9 x))/3 = 3×0
(3 (9-9 x))/3 = 3/3×(9-9 x) = 9-9 x:
9-9 x = 3×0
0×3 = 0:
what set of angles can form a triangle
Answer:
3 acute angles
1 right 2 acute
1 obtuse 2 acute
Step-by-step explanation:
Answer: Acute and 1 right would be a set of angles that are able to form triangle.
At which step did Fatu make an error, if at all?
Choose 1 answer:
A
Step 1
B
Step 2
С
Step 3
D
Fatu's work is correct.
Answer:
Step 3
Step-by-step explanation: