Answer:
a. The average daily amount of time an adult spends on the internet is different than 4.5 hours.
Step-by-step explanation:
An internet provider states that, on average, the daily amount of time an adult spends on the internet is 4.5 hours.
At the null hypothesis, it is claimed that the mean is of 4.5 hours, that is:
[tex]H_0: \mu = 4.5[/tex]
A sociologist studying the behaviors of internet consumers believes the average daily amount an adult spends on the internet is different than the amount stated by the internet provider.
At the alternative hypothesis, the sociologist claim, is that the mean is different of 4.5, that is:
[tex]H_1: \mu \neq 4.5[/tex]
Thus, the correct answer is given by option a.
PLEASE HELPPPPPPP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
what is the problem? ummmmmmmmmmmmmmn weird
Step-by-step explanation:
I can't see it thats why
Can I get help? Thanks so much!
Answer:
when x is 5, y is -1
when x is 3, y is -4
Step-by-step explanation:
plug and chug
< Triangle HIJ is rotated 90 degrees about the origin and dilated by a scale o factor of 2 (with respect to the origin). What are the coordinates of Triangle H"TJ"?
if two of the three points (0,0) ,(2,3) (3,4) lie on one side and other on another side of line x-3y+3
Answer:
Opposite sides
Step-by-step explanation:
Given equation of line is
L=3x−2y+1=0
For the point (2,1), L=5>0
For the point (−3,5),L=−18<0
Opposite signs shows that the two points lies on the opposite side of the line L=0.
2. What is the variable in the expression:
13x3 +7
(Select one answer)
7
3
13
The two triangles are similar.
What is the value of x?
Enter your answer in the box.
x =
Answer:
x=4
Step-by-step explanation:
[tex]\frac{16}{12}= \frac{6x}{5x-2}[/tex]
assuming that the triangles are similar, we can create this ratio of 16 or 12+4 to 6x and 12 to 5x-2
we can cross multiply to get 16(5x-2)=6x(12)
that leaves you with 80x-32=72x
we can then subtract 80x to both sides to get -32= -8x
solve by diving -8 from both sides which means that x=4
Answer:
[tex]this \: triangles \: are \: similar \: so \\ sides \: must \: be \: in \: a \: ratio \\ \frac{16}{12} = \frac{6x}{5x - 2} \\ \frac{4}{3} = \frac{6x}{5x - 2} \\ 4(5x - 2) = 3 \times 6x \\ 20x - 8 = 18x \\ x \: terms \: togather \\ 20x - 18x = 8 \\ 2x = 8 \\ x = \frac{8}{2} \\ x = 4 \\ thank \: you[/tex]
Pls answer , If you do tysm
Answer:
Step-by-step explanation:
ypu bhave to mulitply each by a percentage, for example, the percentage it says you mulitply it by
WILL GIVE BRAINLIEST!!!! Write the following as an EXPRESSION: How much water do I need to add to l liters of pure alcohol to obtain a solution of 45% alcohol?
Answer:
If you add 690 ml of water you will obtain 1.690 liter of 70% alcohol. Of course if you halve the amounts, e.g. 0.5 liter 75% alcohol and 345 ml of water, you will also obtain 45% alcohol solution.
Ming rented a bike from Ted's Bikes. It cost $13 plus $3 per hour. If Ming paid $31,
then he rented the bike for how many hours?
A)7.
B)10.3333
C)6
D)10
Answer:
C, 6
Step-by-step explanation:
31-13 is 18, 18/3 is 6.
Answer:
6
Step-by-step explanation:
31-13= 18
18÷3 = 6
Answer from Gauthmath
solve for q 36q² − 64 = 0
36q² − 64 = 0
=> 36q² = 0 + 64
=> 36q² = 64
=> q² = 64/36
=> q² = 16/9
=> q = √(16/9)
=> q = √16/√9
=> q = ± 4/3
Answer:
q =±4/3
Step-by-step explanation:
36q² − 64 = 0
Add 64 to each side
36q² =64
Divide each side by 36
36q² /36 =64/36
q² =64/36
Take the square root of each side
sqrt(q²) =± sqrt(64/36)
q = ±8/6
q =±4/3
Two minor league baseball players got a total of 390 hits. Washington had 2 more hits than Sanchez. Find the number of hits for each player.
Washington had
hits. Sanchez had
hits
9514 1404 393
Answer:
Washington had 196 hitsSanchez had 194 hitsStep-by-step explanation:
Let s represent the number of hits Sanchez had. Then Washington had (s+2) hits, and their hit total was ...
s +(s+2) = 390
2s = 388 . . . . . . subtract 2
s = 194 . . . . . . . . divide by 2
Sanchez had 194 hits; Washington had 196.
A shop is having a sale.
All items are reduced by 25%
Work out the sale price of an item normally priced at £90
Answer:
£67.50
Step-by-step explanation:
You can divide 90 by 4 and then multiply your answer by 3 to get your final answer.
Hope this helps c:
If 142 adults are randomly selected, what is the probability that the sample mean would differ from the population mean by more than 1.5 kilograms
Complete question;
The mean weight of an adult is 76 kilograms with a variance of 100.
If 142 adults are randomly selected, what is the probability that the sample mean would differ from the population mean by more than 1.5 kilograms
Answer:
7.34% 0r 0.0734
Step-by-step explanation:
We have mean u = 76
Standard deviation = square root of variance
Sd = √100 = 10
N = 142
S = 10/√142
= 10/11.92
= 0.84
X is going to differ by more than 1.5 or less than 1.5
76-1.5 = 74.5
76+1.5 = 77.5
At x = 74.5
Z = (74.5-76)/0.84 = -1.79
At x = 77.5
Z = (77.5-76)/0.8 = 1.79
P value of z at -1.79 = 0.036
P value of z at 1.79 = 0.9633
0.9633-0.0367 = 0.9266
Which is 92.66% probability of differing by 1.5
Probability it differs by more:
P+92.66 = 100
P = 100-92.66
= 7.34% or 0.0734
Thank you!
❤✔
PLEASE HELP ME MAKE SURE YOUR ANSWER IS RIGHT BEFORE ANSWERING
Answer:
Always. Always.
Step-by-step explanation:
All circles conform to the same equations such as using pie to calculate circumference. Unlike a rectangle, for example, all ratios used in a circle are the same.
In a process control study, the overall process average over 15 samples is 63.45 with an average corresponding range of 5.6. What is the lower control limit of the R-chart
Answer:
[tex]LCL=1.94[/tex]
Step-by-step explanation:
From the question we are told that:
Sample size [tex]n=15[/tex]
Mean [tex]\=x=63.45[/tex]
Range [tex]R=5.6[/tex]
Generally at [tex]n=15[/tex]
Value of Control chart constant,
[tex]LCL=D*R[/tex]
Generally the equation for Lower Control Limit is mathematically given by
[tex]LCL=D*R[/tex]
[tex]LCL= 0.347*5.6[/tex]
[tex]LCL=1.94[/tex]
Can anyone help me with this?
Answer:
[tex]\sqrt{7}[/tex]
Step-by-step explanation:
Given
4[tex]\sqrt{7}[/tex] - 10[tex]\sqrt{7}[/tex] + 7[tex]\sqrt{7}[/tex] ( add the coefficients of the terms )
= (4 - 10 + 7) [tex]\sqrt{7}[/tex]
= 1[tex]\sqrt{7}[/tex]
= [tex]\sqrt{7}[/tex]
A town recently dismissed 10 employees in order to meet their new budget reductions. The town had 7 employees over 50 years of age and 18 under 50. If the dismissed employees were selected at random, what is the probability that exactly 5 employees were over 50
Answer:
0.055 = 5.5% probability that exactly 5 employees were over 50.
Step-by-step explanation:
The employees are dismissed from the sample without replacement, which means that the hypergeometric distribution is used to solve this question.
Hypergeometric distribution:
The probability of x successes is given by the following formula:
[tex]P(X = x) = h(x,N,n,k) = \frac{C_{k,x}*C_{N-k,n-x}}{C_{N,n}}[/tex]
In which:
x is the number of successes.
N is the size of the population.
n is the size of the sample.
k is the total number of desired outcomes.
Combinations formula:
[tex]C_{n,x}[/tex] is the number of different combinations of x objects from a set of n elements, given by the following formula.
[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]
In this question:
Total of 7 + 18 = 25 employees, which means that [tex]N = 25[/tex]
7 over 50, which means that [tex]k = 7[/tex]
10 were dismissed, which means that [tex]n = 10[/tex]
What is the probability that exactly 5 employees were over 50?
This is P(X = 5). So
[tex]P(X = x) = h(x,N,n,k) = \frac{C_{k,x}*C_{N-k,n-x}}{C_{N,n}}[/tex]
[tex]P(X = 5) = h(5,25,10,7) = \frac{C_{7,5}*C_{18,5}}{C_{25,10}} = 0.055[/tex]
0.055 = 5.5% probability that exactly 5 employees were over 50.
suppose two soccer teams consist of players with a combined average height of 66 inches. if team a has an average height of 68 inches and has twice as many members as team b, what is the average height of team b
Answer:
The average height of team b is 62 inches.
Step-by-step explanation:
Mean:
The mean of a data-set is the sum of all values in the data-set divided by the number of values, that is:
[tex]M = \frac{s}{n}[/tex]
Sum:
Team a: Mean of 68 inches, 2x members.
Team b: Mean of y inches, x members.
So
[tex]s = 68*2x + yx = x(136 + y)[/tex]
Number of athletes:
[tex]n = 2x + x = 3x[/tex]
What is the average height of team b?
[tex]66 = \frac{x(136+y)}{3x}[/tex]
[tex]66 = \frac{136 + y}{3}[/tex]
[tex]136 + y = 198[/tex]
[tex]y = 198 - 136 = 62[/tex]
The average height of team b is 62 inches.
Find mBFE, help ASAP!!!
Answer: C
<BFE is 148 degrees
Step-by-step explanation:
We have angles <BFC (57 degrees) and <CFD (34 degrees), but what is <DFE?
1. The angle symbol in the vertexes shows that <BFC is congruent to <DFE, meaning that they are the same
2. Knowing this, we can safely say that <DFE is equal to 57 degrees because <BFC is also 57 degrees.
3. Now, we have all the angles we need to find out <BFE.
4. <BFC+<CFD+<DFE=<BFE
5. Substitute to get
57+34+57=<BFE
91+57=<BFE
148=<BFE
6. Now we know that the answer is 148 degrees.
Determine if the sequence below is arithmetic or
geometric and determine the common difference / ratio in
simplest form.
3, 8, 13, ..
(PLEASE HELPP)
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Answer:
arithmetic; common difference of 5
Step-by-step explanation:
It usually works well to check differences first. Here, they are ...
8 -3 = 5
13 -8 = 5
These are the same value, so the sequence is arithmetic with a common difference of 5.
16. write an inequality for each graph
a.....
b.....
17. Graph each inequality on a number line.
a.....
b....
Answer:
Question 16
(a) x < 1 : the values of x are smaller than than 1 (e.g. possible values are 0, -1, -2, etc) and since the circle is not shaded it means that 1 isn't a possible value of x
(b) x [tex]\geq[/tex] -2 : the circle is filled therefore -2 is included in the answer
Question 17
(a) unfilled dot above -2 and arrow pointing to the left
(b) shaded circle above 4 with and arrow pointing to the right →
Find the amount of tax and the selling price
Answer:
$71.415 or $71.42 is the selling price and the taxing is 1
Step-by-step explanation:
This is because I just rounded that extra 5 to make the 41 cents into 42 cents also y=79.35(.9) is the equation you needed to solve so just put 79.35(.9) into a calculator and you'll get 71.415 also 10% turns into a decimal 0.10 and then you subtract it from 1 as a whole and you'll get 0.9. I'm not really a mathmatician but I just got done learning this so I know what to do.
Peter, Jan, and Maxim are classmates. Their total score for the last test was 269. Peter's score was more than the sum of Jan's and Maxim's scores. What could be Peter's least possible score?
Answer:
135
Step-by-step explanation:
Given that :
Total score obtained by Peter, Jan and Maxim = 269
Let :
Peter's score = x
Jan's score = y
Maxim's score = z
x + y + z = 269
x > (y + z)
For x to be greater Than y + z ;
Then x > (269 / 2) ; x > 134.5
The least possible x score is 135
Hence, Peter's least possible score is 135.
What is the index of the radical below?
√10
A. 5
B. 9
C. 2
D. 10
Ravi has 33 marbles his brother has twice as many how many marbles do they have all together
Answer
Together, they have 99 marbles.
Explanation
Ravi has 33 marbles.
His brother has twice (two times) as many marbles as him. Ravi's brother has 33×2=66 marbles.
Together, they have 33+66=99 marbles.
Together, they have 99 marbles.
What is multiplication?A product, or an expression that specifies factors to be multiplied, is what happens when you multiply two numbers in mathematics. For instance, the product of 5 and 6 is 30.
given
Ravi has 33 marbles.
His brother has twice (two times) as many marbles as him. Ravi's brother has 33×2=66 marbles.
Together, they have 33+66=99 marbles.
To learn more about multiplication refer to:
https://brainly.com/question/134018
#SPJ2
What is the value of x?
Answer:
Step-by-step explanation:
(2x - 5)° + 45° = 180°
2x - 5 + 45 = 180
x = 70
Find the perimeter of a triangle with sides 2 ft 3 in., 3 ft 4 in., and 4 ft 6 in.
3. line has undefined slope and passes through (1,8)
Answer: x = 1
Step-by-step explanation:
(any line with an undefined slope is a vertical line)
x = 1 has an undefined slope and passes through (1,8)
Martha ran a 3-mile race in 24 minutes. how long does it take her to run 1 mile?
Answer:
8 minuets
Step-by-step explanation:
24min/3miles = 8
Answer:
8 minutes.
Step-by-step explanation:
If we divide 24 minutes by 3 miles, your answer will be 8 minutes.
The diameter of the circle is 2”. What is the area of the circle
Answer:
[tex]\pi[/tex]
Step-by-step explanation:
1. 2/2 =1 1 is the radius
2. [tex]A = \pi r^2[/tex]
3. [tex]A=\pi 1^2[/tex]
4. [tex]A=\pi[/tex]
