Which is worked out correctly ?
Answer:
choice 2) 1/5 x 3/15 = 3/75 = 1/25
Step-by-step explanation:
The situation is as follows: Smart phones have changed the world and how we spend our time. A group of researchers at BYU want to estimate the mean daily number of minutes that BYU students spend on their phones. In fall 2019, they took a random sample of 430 BYU students and found that on average, students spend 312 minutes on their phones with a standard deviation of 54 minutes per day. The plot of the sample data showed no extreme skewness or outliers. Calculate a 96% confidence interval estimate for the mean daily number of minutes that BYU students spend on their phones in fall 2019. Do not round off in the intermediate steps, only the final answer should be rounded off to two decimal places.
Answer:
The 96% confidence interval estimate for the mean daily number of minutes that BYU students spend on their phones in fall 2019 is between 306.65 minutes and 317.35 minutes.
Step-by-step explanation:
Confidence interval normal
We have that to find our [tex]\alpha[/tex] level, that is the subtraction of 1 by the confidence interval divided by 2. So:
[tex]\alpha = \frac{1 - 0.96}{2} = 0.02[/tex]
Now, we have to find z in the Ztable as such z has a pvalue of [tex]1 - \alpha[/tex].
That is z with a pvalue of [tex]1 - 0.02 = 0.98[/tex], so Z = 2.054.
Now, find the margin of error M as such
[tex]M = z\frac{\sigma}{\sqrt{n}}[/tex]
In which [tex]\sigma[/tex] is the standard deviation of the population and n is the size of the sample.
[tex]M = 2.054\frac{54}{\sqrt{430}} = 5.35[/tex]
The lower end of the interval is the sample mean subtracted by M. So it is 312 - 5.35 = 306.65 minutes
The upper end of the interval is the sample mean added to M. So it is 312 + 5.35 = 317.35 minutes
The 96% confidence interval estimate for the mean daily number of minutes that BYU students spend on their phones in fall 2019 is between 306.65 minutes and 317.35 minutes.
if the function f(x)=2x-3 and g(x)= 3/2x + 1 which is a tru statement?
1- f(0)>g(0)
2- f(2)=g (2)
3- f(8)=g(8)
4- g(4)<f(4)
Answer: 3 f(8)=g(8)
Step-by-step explanation:
2(8)-3=3/2(8)+1
16-3=12+1
13=13
Answer:
3 is true
Step-by-step explanation:
f(x) =2x - 3→ 2*8 - 3 =13
g(x) = 3/2x + 1 → 3/2(8) + 1 = 3*4 +1 = 14
Observa la siguiente tabla que muestra los precios de un libro de cuentos y sus
respectivos descuentos en cuatro librerías.
Libreria
Answer:
No conozco este pero puedo ayudarte con otros
Step-by-step explanation:
Based on the table given, the bookstore that discounts more pesos from the original price is Leer es saber.
Which bookstore has the highest discount?Discount from El cuentacuentos:
= 100 x 20%
= $20
Discount from Leer es saber:
= 125 x 25%
= $31.25
Discount from El librote:
= 80 x 5%
= $4.00
Discount from Imagina:
= 90 x 10%
= $9
The highest is therefore Leer es saber.
The rest of the question is:
Qué librería descuenta más pesos del precio original?
Find out more on discounts at https://brainly.com/question/1548141.
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so it says to show your work .
I don't know how to do this
Answer:
Did not let me say app names lol
Answer:
i think its this one (x−30)(x+3)
Write 4/3 as a mixed number
Answer:
1 1/3
Step-by-step explanation:
Ifn is an integer and n2 squared is divisible by 4, then n is divisible by 4.
This is false, we can prove this with a simple counterexample.
2^2=4
4 is divisible by 4
but 2 is not divisible by 4
6
Triangle MNP and triangle JKL are similar right triangles.
K к
L
р
Which proportion can be used to show that the slope of IL is equal to the slope of MP?
A 0 - (-7)
4- (-4)
-4 - (-10)
8- (-1)
C 0 - (-4)
4- (-7)
-4-(-1)
8- (-10)
B
0 - 4
4-(-7)
--4-8
- 1 - (-10)
D4=(27) = -1-(-10)
4 - 8
Answer:
its b
Step-by-step explanation:
The proportion that can be used to show that the slope of JL is equal to the slope of MP is (0 - 4)/(-4 - (-7)) = (-4 - 8)/(-1 - (-10))
How to determine the proportion that can be used to show that the slope of JL is equal to the slope of MP?From the question, we understand that triangle MNP and triangle JKL are similar right triangles.
This means that triangle MNP and triangle JKL have the same slope
From the figure, we have the following coordinates of the triangles
J = (-7, 4)
L = (-4, 0)
M = (-10, 8)
P = (-1, -4)
The slope is calculated as
Slope = (y2 - y1)/(x2 - x1)
So, we have
JL = (0 - 4)/(-4 - (-7))
Also, we have
MP = (-4 - 8)/(-1 - (-10))
Equate both equations
So, we have
(0 - 4)/(-4 - (-7)) = (-4 - 8)/(-1 - (-10))
Hence, the proportion that can be used to show that the slope of JL is equal to the slope of MP is (0 - 4)/(-4 - (-7)) = (-4 - 8)/(-1 - (-10))
Read more about slope at
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Which gives an equation for the line perpendicular to y = 2/3x + 1 that contains (0, 2) * O y = 3/2x + 2 O y = -3/2x + 2 O y = 3/2x-2 O y = -3/2x-2
Answer:
[tex]y = -\frac{3}{2}x + 2[/tex]
Step-by-step explanation:
Equation of a line:
The equation of a line has the following format:
[tex]y = mx + b[/tex]
In which m is the slope and b is the y-intercept(value of y when x = 0).
If two lines are perpendicular, the multiplication of their slopes is -1.
Contains (0, 2)
This means that [tex]b = 2[/tex]. So
[tex]y = mx + 2[/tex]
Finding the slope:
Perpendicular to y = 2/3x + 1 means that:
[tex]\frac{2m}{3} = -1[/tex]
[tex]2m = -3[/tex]
[tex]m = -\frac{3}{2}[/tex]
So
[tex]y = -\frac{3}{2}x + 2[/tex]
I need help with this question, pls put step by step
Answer:
150 degrees and 30 degrees
Step-by-step explanation:
Let's say the measure of the angle is x. This angle is 5 times that of its supplementary, supplementary angles will add up to 180 degrees. So we have an equation of x = 5(180-x). Solve this equation for x
x = 5(180-x)
x = 900 - 5x
6x = 900
x = 150 degrees, this is the value of one angle
The other angle is 180-x = 180-150 = 30 degrees
What is f(3) for the function f(x)=6x+5?
Answer:
23
Step-by-step explanation:
Help? Please lol um math is hard
Answer:
Ikr
Step-by-step explanation:
I used to be able to know what 1 + 1 but now I have no idea how to solve that
(Im jk btw lol)
Tims piggy bank contains nickels and quarters worth $6.70. He has 62 coins in all. How many of each coin does Tim have?
Answer:
well you see it really
Step-by-step explanation:
Can someone please help!!!
Answer:
I think is the 3rd one but I am not sure
Been stuck on this question for 20 minutes, can someone please help.
I'm sorry m8 the only options I can give you is life or death. also can u give me brainliest many thank xoxo
The value of a particular investment follows a pattern of exponential growth. In the year 2000, you
invested money in a money market account. The value of your investment t years after 2000 is
given by the exponential growth model A = 5900e0.059t By what percentage is the account
increasing each year?
A) 6.6%
B) 6.5%
C) 6.3%
D) 5.9%
Answer:
b
Step-by-step explanation:
A cuántos grados equivalen πrad
You have a bag of 10 marbles. Three of them are red, five are blue, and two are green. What is the probability of randomly picking
a green or blue marble out of the bag?
A)
0
B)
1
10
09
2
D)
7
10
Answer:
EX :A jar contains 10 red marbles, 4 white marbles, and 2 blue marbles. Two ... To solve this question, you can solve for the probability of choosing 2 marbles that are pink and ... There are two even numbers and three odd numbers, so P (even) = 2/5 and P (odd) = 3/5. ... In a bag, there are 10 red, 15 green, and 12 blue marbles.
Step-by-step explanation:
Tim spent $12.90 on a jacket and $8.45 on pants, and $13.32 on a shirt. He
went to 2 shops. In total, how much money did Tim spend on clothing?
Answer:
he spent $34.67 that is the answer
5. Can two fractions point to the same location on the number line? Explain.
Answer:
1 2 = 2 4 = 3 6 = 4 8 = etc. All of these fractions are located at the same point on the number line. Therefore, they represent the same number. From the paper folding exercises, we see that increasing both numerator and denominator of a fraction by the same factor gives an equivalent or equal fraction.
Hope this helps :) Just know I tried.
Which of the following is the solution to the equation 25(z + 4) = 125?
help it time and i have no answer left on branly
Answer:
4/3
10/3
24/3
...........
Answer:
4/3
10/3
24/3 or 8
Step-by-step explanation:
x = y - 2/3
2 - 2/3 = 2/1 - 2/3 = 6/3 - 2/3 = 4/3
y = x + 2/3
8/3 + 2/3 = 10/3
y = x + 2/3
22/3 + 2/3 = 24/3 = 8
please could i have help with this i get 336m and its not one of the choices
Answer:
a. 30 m
I hope it helps....
Answer:
30m
Step-by-step explanation:
[tex]18m^{2}[/tex]/m + 4m(3)
= [tex]30m^{2}[/tex]/m
= 30m
Hope it helps,
Please mark me as the brainliest
Thank you
help help help help help pls
Answer:
3: 2 because for every 4 men there was 1 women so 4 + 1 = 5 and x 2 = 10 so thats the number of adults and since we multiplied by 2 we have to women
If the total number of people attending the game was 64,000, how many people were
supporters of the home team?
A 12,800
B 38,400
C 48,000
D 51,200
10 points!! Will mark brainliest. No question just tell me more about Area of Composite Figures and how to find it. I will report If answer is unrelated.
Answer:
To find the area of a composite figure, separate the figure into simpler shapes whose area can be found. Then add the areas together. Be sure than none of the simpler figures have overlapping areas. To calculate the area of a composite shape you must divide the shape into rectangles, triangles or other shapes you can find the area of and then add the areas back together. To find the area of a rectangle, multiply its height by its width. For a square you only need to find the length of one of the sides (as each side is the same length) and then multiply this by itself to find the area. This is the same as saying length2 or length squared.
What is the solution of log3x − 5 16 = 2?
Answer:
log (16)=2 in base 3x-5
==>16=2^(3x-5)
==>2^4=2^(3x-5)
==>4=3x-5
==>3x=9
==>x=3
Step-by-step explanation:
Estimate the solution to the system of equations.
You can use the interactive graph below to find the solution.
y=-2x-5
y = 2x - 2
Choose 1 answer:
3
1
A
4
3
1
С
=1
3
Y
4
3
(o
4)
y
of
5
3
2
1
-6 5 4 3 2
1 2 3 4 5 6
-2
-3
--5-
Answer:
thi dhany kar rahe the aur man apane ghar men hi the jinhone apani bat ko lekar bhi
Solve for x. Enter the solutions from least to greatest.
Round to two decimal places.
(x + 8) ^2– 2 = 0
lesser x =
greater x =
Answer:
Lesser x: -9.41
Greater x: -6.59
Step-by-step explanation: khan academy
CAN SOMEONE PLEASE HELP ME WITH THIS ITS DUE TODAY I WILL BRAINLIEST WHO EVER TELLS ME THE ANSWER
Answer:
There is a error that is
Not : 4 × 6
Correct: 4 × 4
Step-by-step explanation:
Given ,
Base of the parallelogram = 4 in.
Height of the parallelogram = 4 in.
Therefore,
Area of the parallelogram = base × height
= 4 in. × 4 in.
[tex] = 16 {in.}^{2} (ans)[/tex]