Answer:
The 95% confidence interval for the difference in mean profile height and mean actual height of online daters is between 0.27 and 0.87 inches.
Step-by-step explanation:
We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.
The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So
df = 30 - 1 = 29
95% confidence interval
Now, we have to find a value of T, which is found looking at the t table, with 29 degrees of freedom(y-axis) and a confidence level of [tex]1 - \frac{1 - 0.95}{2} = 0.975[/tex]. So we have T = 2.0452
The margin of error is:
[tex]M = T\frac{s}{\sqrt{n}} = 2.0452\frac{0.81}{\sqrt{30}} = 0.3[/tex]
In which s is the standard deviation of the sample and n is the size of the sample.
The lower end of the interval is the sample mean subtracted by M. So it is 0.57 - 0.3 = 0.27 inches.
The upper end of the interval is the sample mean added to M. So it is 0.57 + 0.3 = 0.87 inches.
The 95% confidence interval for the difference in mean profile height and mean actual height of online daters is between 0.27 and 0.87 inches.
10 POINTS FOR CORRECT ANSWER PLEASE HELP ME
Consider the right cones pictured below.
Which value of x would make the two cones similar?
O4
4/7 16/7 49/4
Answer:
D
Step-by-step explanation:
I just took it
Answer:
D
Step-by-step explanation:
edge 2021
Help i'll give you brainlyest
Answer:
can I see the third one, like can I see the full page because I can't see the rest
Answer step by step
please
Answer:
the answer is D, because 30/2 is 15.
Answer:
15
Step-by-step explanation:
Angle CDA = 1/2 ×angle ABC
because the angle at the center of the circle is twice of the angle at the circumference.
so angleCDA = 1/2 ×30 = 15 degrees
Answer these two questions ASAP please, help is appreciated.
Answer:
B and A
Step-by-step explanation:
STANKY PLSS HELP ME ❤️
Answer:
PQS is a triangle
Step-by-step explanation:
Area of triangle= L×B
So,
20×7
140cm²
Answer :70
Step-by-step explanation:
Area formula: a times b/ 2
PQS: 7 times 20/ 2= 70
Your answer is 70
I hope this helps and may God bless you. have a nice day, bye!
mobymax help 11 points math
Answer:
10/15 + 3/15 = 13/15
Step-by-step explanation:
solve the equation
t^3=-343
Answer:
7
Step-by-step explanation:
t^3=7^3
t=7^3-^3
t=7
Please mark me as brainliest
Answer:
t = -7
Step-by-step explanation:
if you multiply -7 by -7, you get 49. Now if you multiply 49 times -7 you get -343
3. What type of sequence is this?
0,2,5,9,14,...
Arthimetic
Geometric
Neither
Neither is the correct answer
Can someone please tell 5% as a fraction
Answer:
5/100 = 1/20
Step-by-step explanation:
5% = .05 = 5/100 = 1/20
There are 20 students in Lynn's class. 12 of the students are in choir and 8 are in band. Write a fraction, in simplest form, to represent the part of the class that is in choir.
Answer:
3/5
Step-by-step explanation:
i♀️♀️
Answer:
3/5
Step-by-step explanation:
students in choir - 12
total number of students - 20
students in choir
-------------------------
total no. of students
12
----
20
3
--
5
Mila invested $9,300 in an account paying an interest rate of 4\tfrac{7}{8}4
8
7
% compounded monthly. Carter invested $9,300 in an account paying an interest rate of 4\tfrac{3}{4}4
4
3
% compounded continuously. After 7 years, how much more money would Mila have in her account than Carter, to the nearest dollar?
Answer: 105 (rounded to the nearest dollar)
Step-by-step explanation:
It’s correct on delta match
What is the simplified value of the expression below?
Answer:
I dont know the experssion but I will give you steps to figure it out!
Step-by-step explanation:
Before you evaluate an algebraic expression, you need to simplify it. This will make all your calculations much easier. Here are the basic steps to follow to simplify an algebraic expression:
remove parentheses by multiplying factors
use exponent rules to remove parentheses in terms with exponents
combine like terms by adding coefficients
combine the constants
When simplifying an expression, the first thing to look for is whether you can clear any parentheses. Often, you can use the distributive property to clear parentheses, by multiplying the factors times the terms inside the parentheses. In this expression, we can use the distributive property to get rid of the first two sets of parentheses.
Now we can get rid of the parentheses in the term with the exponents by using the exponent rules we learned earlier. When a term with an exponent is raised to a power, we multiply the exponents For example, (x2)2 becomes x4.
The next step in simplifying is to look for like terms and combine them. The terms 5x and 15x are like terms, because they have the same variable raised to the same power
Finally, we look for any constants that we can combine.
Now our expression is simplified. Just one more thing -- usually we write an algebraic expression in a certain order. We start with the terms that have the largest exponents and work our way down to the constants. Using the commutative property of addition, we can rearrange the terms and put this expression in correct order, like this.
What number is ten more than 100? Write an equation.
Answer:
10+100=110
Step-by-step explanation:
easy as pie
Answer:
110?
Step-by-step explanation:
If its 10 more (more being addition) than 100 then it should be 110
What number should be added to both sides of the equation to complete the square?
x2 - 6x = 5
Answer:
Ans: 9
pls mark as brainliest!!
Step-by-step explanation:
Completing the square is done as follows:
1. Write the equation in a way that the constants are in the right side while the terms with x are on the left.
x^2 – 6x = 5
2. Make sure that the coefficient of the x^2 term is 1.
x^2 – 6x = 5
3. Adding a term to both sides that will complete the square in the left side. This is done by dividing the coefficient of the x term by 2 and squaring it. Note: The same amount should be added to the right side to balance the equation.
x^2 – 6x + 9 = 5 + 9
(x-3)^2 = 14
Therefore, 9 should be added to both sides to complete the square.
GIVING EVERYTHING IF CORRECT. NO MORE LINKS.
I think the answer is C
PS: WILL GIVE BRANLIEST
Select ALL the ratios that are equivalent to 16 : 6
a. 3 to 8
b. 32 : 12
c. 4 to 2
d. 8 to 3
Question 3 options:
a & b
b & c
b & d
a & c
I'm pretty sure it a 3 to 8 and 32 to 12
Answer:
The answer will be b & c.
The answer will be e B and C that is 32:12 and 4 to 2. Because it is equivalent to 16: 6.
please help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
7*3=21
21*2=42
42 units^3
Step-by-step explanation:
brainliest
Find the lateral area of the cylinder.
Answer:
[tex]A=440\ m^2[/tex]
Step-by-step explanation:
Given that,
The diameter of the cylinder, d = 10 m
Hight, h = 14 m
Radius, r = d/2 = 5 m
We need to find the lateral area of the cylinder. The formula for the lateral area of the cylinder is given by :
[tex]A=2\pi rh\\\\A=2\times \dfrac{22}{7} \times 5\times 14\\A=440\ m^2[/tex]
So, the lateral surface area of the cylinder is equal to [tex]440\ m^2[/tex].
What is the solutions to this system of equations?
x+ 2y - z = 3
2x - y + 2z = 6
x- 3y + 3z = 4
____________
A) (-6,7,14)
B) (2,-3,5)
C) infinite solutions
D) no solutions
Answer:
D- No solution
Step-by-step explanation:
Isolate x for x+2y−z=3: x=3−2y+z
then Simplify
then Isolate y for −5y+4z+6=6: y= 4z 5 −5y+4z+6=6 Subtract 6 from both sides −5y+4z+6−6=6−6 Simplify −5y+4z=0 Subtract 4z from both sides −5y+4z−4z=0−4z Simplify −5y=−4z Divide both sides by −5 −5y −5 = −4z −5 Simplify y= 4z 5
lastly simply.
Apply the elimination method to solve the system of equations 2x + 6y = 8 and 3x + 2y = 5. Which THREE statements are correct?
Answer:E,D,A
Step-by-step explanation:
Solve for angle x help plz
Answer:
123 degrees
Step-by-step explanation:
Answer:
123°
Step-by-step explanation:
360 - 114 - 43 - 80 = 123
Halloween candy goes on sale 25% off the day after Halloween. If a bag of candy is priced $10, what is the price the day after Halloween?
Someone please help me, I can't figure this out. I already asked this but I got a file. Please no files, I'm begging, I just want my math answers. Thank you,
(Look in image for question)
(Measurements are 4cm, 10cm, 5cm, 6cm, and 5cm).
Answer:
I believe the volume is 120 and the surface area is 124
Step-by-step explanation:
Need help!! algebra!!!
Part A: The area of a square is (4a2 − 20a + 25) square units. Determine the length of each side of the square by factoring the area expression completely. Show your work. (5 points)
Part B: The area of a rectangle is (9a2 − 16b2) square units. Determine the dimensions of the rectangle by factoring the area expression completely. Show your work. (5 points)
Answer:
Step-by-step explanation:
Drag and drop number tiles into the boxes to show the median, first quartile (Q1) and third quartile (Q3)
of the data on the dot plot.
Answer:
Median = 5
Q1 = 2
Q3 = 10
Step-by-step explanation:
✔️On the dot plot, each dot represents a data point.
The median is the middle data point which is the 6th data point on the dot plot.
This:
Median = 5 (6th data point)
✔️Q1 is the middle value of the lower set of data points before the median = the 3rd data point
The 3rd data point is 2
Therefore,
Q1 = 2
✔️Q3 is the middle value of the upper set of data points after the median = the 9th data point.
The 9th data point = 10
Therefore,
Q3 = 10
Answer:9
Step-by-step explanation:
Please help me! It’s due soon!
Find the equation for the following parabola. Vertex 0,0. Focus 2,0.
Answer:
8x
Step-by-step explanation:
Answer:
Hi there! The equation for this parabola is y^2=8x.
Press the button without the slightest hesitation! :)
Step-by-step explanation:
Correct for Acellus! :)
What is the slope of this line (0,8), (6,-4)
Answer:
-2
Step-by-step explanation:
formula: (-4)-8/6-0 or 8-(-4)/0-6
=-12/6
=-2 (hope this helps)
An expression is shown below:
2x3y + 8xy − 4x2y − 16y
Part A: Rewrite the expression by factoring out the greatest common factor. (4 points)
Part B: Factor the entire expression completely. Show the steps of your work. (6 points)
Plz help, give good answer and get brainlest!!
Answer:
2y is greatest common factor
Add and subtract the second term to the expression and factor by grouping.
2y(x−2)(x2+4) is the factor
Step-by-step explanation:
Answer:
Part A: Rewrite the expression by factoring out the greatest common factor. (4 points)
answer:
2y(x³+4x-2x²-8)
Part B: Factor the entire expression completely. Show the steps of your work. (6 points)
answer:
2y(x³+4x-2x²-8)
2y(x³-2x²+4x-8)
2y(x²(x-2)+4(x-2))
2y(x²+4)(x-2)