Answer:
8x-6
Step-by-step explanation:
3(x-2)+5x = 3x - 6 +5
Answer:
8x - 6
Step-by-step explanation:
3x - 6 + 5x
3x + 5x= 8x
8x-6
The mean family income for a random sample of 550 suburban households in Nettlesville shows that a 92 percent confidence interval is ($45,700, $59,150). Braxton is conducting a test of the null hypothesis H0: µ = 44,000 against the alternative hypothesis Ha: µ ≠ 44,000 at the α = 0.08 level of significance. Does Braxton have enough information to conduct a test of the null hypothesis against the alternative?
multiple-choice options:
H0: µ > 17 miles per gallon, Ha: µ ≥ 17 miles per gallon
H0: µ ≤ 17 miles per gallon, Ha: µ < 17 miles per gallon
H0: µ = 17 miles per gallon, Ha: µ > 17 miles per gallon
H0: µ = 17 miles per gallon, Ha: µ < 17 miles per gallon
H0: µ = 17 miles per gallon, Ha: µ ≠ 17 miles per gallon
The solution is:
43100 ≤ μ ≤ 59710
And for this case we want to test the following hypothesis:
Null hypothesis: μ = 42000
Alternative hypothesis: µ ≠ 42,000
For this case since the lower value of the confidence interval is higher than 42000 we have enough evidence to reject the null hypothesis at the 55 of significance and we can conclude that the true mean is significantly different from 42000
What is the confidence interval?A confidence interval is a range of values, derived from a sample of data, that is likely to contain an unknown population parameter with a certain level of confidence.
here, we have,
The confidence interval for the mean is given by the following formula:
(1) X± t_α/2* s/√n
And for this case the 95% confidence interval is already calculated as:
43100 ≤ μ ≤ 59710
And for this case we want to test the following hypothesis:
Null hypothesis: μ = 42000
Alternative hypothesis: µ ≠ 42,000
For this case since the lower value of the confidence interval is higher than 42000 we have enough evidence to reject the null hypothesis at the 55 of significance and we can conclude that the true mean is significantly different from 42000.
To learn more about the confidence interval, visit:
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need help with this
Answer:
B. {2, 4, 6, 8}
HELP ASAP I WILL GIVE BRAINLIEST!!!!
Find the surface area of the sphere.
r = 3 cm
Formulas for Spheres
S.A. = 40r2
V = frer S.A. = [?] cm2
Round to the nearest tenth.
Enter
Answer:
360cm²
Step-by-step explanation:
If the formula in the question is correct (S.A. = 40r²) then you just have to change r for r value:
40 * 3² = 40 * 9 = 360cm²
Hope it helps .
What is the value of angle K to the nearest What is the value of angle K to the nearest tenth?
Trig functions
Help!!!!!!!
Answer:
[tex]Cos K = \frac{adjacent}{opposite} = \frac{5}{6}\\\\K = Cos^{-1}(\frac{5}{6} ) = 33.557\\K= 33.6[/tex]
The annual tuition at a four-year university is $9,890. What is the cost for four years? $
Answer:
39560
Step-by-step explanation:
9890+ 9890 + 9890+ 9890= 39560
Solve this: -4a = -52
Answer:
Hello! answer: 13
Step-by-step explanation:
-4 × 13 = 52 therefore a = 13 HOPE THAT HELPS!
Answer:
a = 13
Step-by-step explanation:
u need to solve for a so get it on one side by itself and do that by dividing both sides by -4
-4a= 52
−4a÷ -4= a
52 ÷ -4 = -13
a= 13
special right triangles IXL question #2
pls help question is in pic
Find the slope of the lines shown in the graph
PLEASE HELP
I NEED THE ANSWER NOW !!
Answer:
number 1 is the answr
Step-by-step explanation:
Answer:
one i think but i might be wrong
Step-by-step explanation:
What is the mean of the following data set?
{5, 9, 5, 2, 7, 10}
6.30
5.3
10.2
8.2
How large a sample should be selected to provide a 95 confidence interval with a margin of error of 10? Assume that the population standard deviation is 40.
Answer:
the required sample size is 62
Step-by-step explanation:
Given the data in the question;
Confidence interval C = 95% = 0.95
Margin of error E = 10
population standard deviation σ = 40
sample size n = ?
We use the following formula to get our sample size;
sample size n = ( ( [tex]Z_c[/tex] × σ ) / E )²
Next we find z value for confidence interval
Confidence interval C = 95% = 0.95
Area = ( 1 + c )/2 = ( 1 + 0.95)/2 = 1.95 / 2 = 0.975
Now we check our z-table to see the area where 0.975 falls;
It falls under column 0.06 and Row 1.9
so, our z-value for confidence interval of 0.95 is 1.96
so we substitute
sample size n = ( ( 1.96 × 40 ) / 10 )²
n = ( 78.4 / 10 )²
n = ( 7.84 )²
n = 61.4656
we know that sample size is always rounded up, so
n = 62
Therefore, the required sample size is 62
Rewrite using exponents:
A.
4.4.4.4
B.
a.a.a
Answer:
A is 4 with an exponent of 4.
B is A with an exponent of 3.
hope this helps :)
Find the surface area of the prism.
5 cm
3 cm
7 cm
A prism has 6 sides.
2 sides are 7 x 5
2 are 3 x 5
2 are 3 x7
Surface area = 2(7x5) + 2(3x5) + 2(3x7)
Surface area = 70 + 30 +42
Surface area = 142 square cm
Answer:
A=2(wl+hl+hw)
A= 2 (3×7+7×5+5×3)
A=2×71
A=142
Find the length of the third side. If necessary, write in simplest radical form.
Answer:
[tex]( x) {}^{2} = (5) {}^{2} + ( \sqrt{11} ) {}^{2} \\ {x}^{2} = 25 + 11 \\ {x}^{2} = 36 \\ x = 6[/tex]
O Rs 600
O Rs 700
1 р
2. The cost price of the watch is Rs
800.If the article is sold for Rs 1200,find
the profit percent.*
40%
O
50%
O
60%
30%
What is the area of the circle of the eye ?
Answer:
d
Step-by-step explanation:
i think im nt sure th0
Use the picture find the measure of REL
Answer:
[tex]\huge\boxed{\sf 90\ degrees}[/tex]
Step-by-step explanation:
P is the center of the circle
Chord RL passes through the center of the circle. Hence it is the diameter of the circle.
According to Thales's Theorem: (The angle opposite to the diameter is 90 degrees when a triangle is drawn in that semi-circle)
=> m∠REL = 90°
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AH1807What is 20000 times 18000
Answer:
ez the answer is 360000000
Step-by-step explanation:
Answer:
the answer is 360000000
Step-by-step explanation:
Police body cameras: A survey of New York State residents asked about police officers having to wear video cameras on duty. The question stated, "Do you agree or disagree that police officers should carry video cameras for the purposes of filming their activities while on duty?" Most (88%) respondents agreed with this statement. Do Californians share the same opinion? A California-based civil rights group conducted a similar survey by randomly selecting 500 California residents, and 425 agreed that police officers should carry video cameras for the purposes of filming their activities while on duty. Conduct a hypothesis test to determine if the proportion of California residents who agree is different from New York residents. Use a 5% significance level to make your decision. Use the applet (at the top of this Checkpoint) to determine the P-value. Which of the following is an appropriate conclusion based on the results?
a. The survey provides strong evidence that the proportion of California residents who agree that police officers should carry video cameras for the purposes of filming their activities while on duty is significantly different from the proportion of New York residents.
b. The survey suggests that the proportion of California residents who agree that police officers should carry video cameras for the purposes of filming their activities while on duty is 85%.
c. Of the California residents surveyed, 85% agree that police officers should carry video cameras for the purposes of filming their activities while on duty, but this is not strong enough evidence to conclude that the proportion of California residents who agree is significantly different from the proportion of New York residents.
d. This survey suggests that 88% of California residents surveyed agree that police officers should carry video cameras for the purposes of filming their activities while on duty.
Answer:
Step-by-step explanation:
Students on the baseball team and in the French club were asked how many pets they have. The results are shown.
Baseball Team: 0,0,0,1,1,1,1,1, 2, 2, 2,3,3,3,4
French Club: 0,0,1, 1, 1, 2, 2, 2, 2,3,3,3,3,4,6
What is the difference of the means of the two sets of data?
A. 0.6
B. 1
O C. 1.9
D. 2
Answer:
A
Step-by-step explanation:
The baseball teams total is 24, divided by the number of answers, 25, is 1.6.
The French Club’s total is 33, divided by the number of answers, 15, is 2.2.
2.2-1.6 is 0.6.
The Newberry library loaned 35 CDs last month, 10 of which were Latin albums. Considering this data, how many of the next 91 CDs loaned out should you expect to be Latin CDs?
Which is greater?.75 or 3/5
Answer:
75 is greater than 3/5
Step-by-step explanation:
May I please have brainiest
simplify 7.06 ×1000 - 1976 ÷100
[tex]\huge\text{Hey there!}[/tex]
[tex]\large\text{7.06}\times\large\text{1,000 - 1,976}\div\large\text{100}\\\large\text{7.06}\times\large\text{1,000 = \boxed{\bf 7,060}}\\\large\text{7,060 - 1,976}\div\large\text{100}\\\large\text{1,976}\div\large\text{100 = 494}\div\large\text{25 = \boxed{\bf 19.76}}\\\large\text{7,060 - 19.76}\\\mathsf{= \boxed{\bf \ Answer: \dfrac{17,6006}{25}\ or\ 7,040.24}}\leftarrow\large\text{either of those choices should}\\\large\text{work because they are both equivalent to each other }[/tex]
[tex]\large\text{Good luck on your assignment and enjoy your day!}[/tex]
~[tex]\frak{Amphitrite1040:)}[/tex]
The weights of eight puppies have the following statistics:
mean: 10
median: 7.5
mode: 7
List one set of possible weights in the table below.
Answer:
7, 7, 7, 7.5, 7.5, 14, 20, 10
Step-by-step explanation:
Since the median has to be 7.5, you know that the 4th and 5th numbers have to average out to 7.5. In simpler terms, the two numbers have to add up to 15 so that when you divide them by 2, you get 7.5. Then you know that the mode is 7. So, the magority of the numbers have to be 7. This is why I made the first 3 numbers 7. Then you know that the mean is 10, so all the numbers have to add up to 80. So, if you add up the numbers you have so far you get 36. This means that the remaning numbers have to add up to 44. Here you can really choose any numbers you want, as long as they add up to 44. That is why I chose, 14, 20, and 10. Lastly to check the numbers you put in, find the mean, median and mode. If they all match up with median: 7.5, mean: 10, and mode: 7, then your numbers work! Hope that helps!
✌
One possible data set can be -
8, 7, 8, 7, 8, 7, 15, 7, 13
We have the following statistics for weights of eight puppies -
Mean: 10
Median: 7.5
Mode: 7
We have to list the set of possible weights for eight puppies.
Define Mean, Median and Mode for a given set of data.The mean (average) of a data set is found by adding all numbers in the data set and then dividing by the number of values in the set.
The median is the middle value when a data set is ordered from least to greatest.
The mode is the number that occurs most often in a data set.
According to the question, we have -
Number of puppies = 8
Mean = 10
Median = 7.5
Mode =7
Assume the sum of weights of all puppies be x. Therefore -
[tex]$\frac{x}{8} = 10[/tex]
x = 80
Now -
Mode = 7 → This means that the number 7 has occurred the most in the set.
Median = 7.5 → This means that 7 is the middle value when a data set is ordered from least to greatest. The data set can be -
8, 7, 8, 7, 8, 7, 15, 7, 13
Hence, one possible data set can be -
8, 7, 8, 7, 8, 7, 15, 7, 13
To solve more questions on statistics, visit the link below-
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Binh has to write an 8 page report. If he has written 3/4 of his report so far, how many pages has he written?
Answer:
6
Step-by-step explanation:
you're overthinking the problem, all you have to do is multiply 8 and (3/4) to get 6, super easy
The ratio of boys to girls in a class
is 5:7. There are 36 students in the
class. How many more girls than boys
are there?
Answer:
tbh i may be too late but the answer is 6
Step-by-step explanation:
the ratio 5:7 in the question is basically saying for every 5 boys are 7 girls
if you multiply the number of boys by 5 ( which would equal 15) you would have 21 girls, 15 + 21 equals 36. 21- 15= 6 giving us the anser
What is the inverse of f(x)=2^x
Answer:
[tex] {f}^{ - 1} (x) = \frac{ln(x)}{ln(2)} [/tex]Step-by-step explanation:
[tex] f(x)=2^x[/tex]
[tex]y = {2}^{x} [/tex]
[tex]x = {2}^{y} [/tex]
[tex] {2}^{y} = x[/tex]
[tex]ln( {2}^{y} )=ln(x)[/tex]
[tex]yln(2)=ln(x)[/tex]
[tex] \frac{yln(2)}{ln(2)} = \frac{ln(x)}{ln(2)} [/tex][tex]y = \frac{ln(x)}{ln(2)} [/tex][tex] {f}^{ - 1} (x) = \frac{ln(x)}{ln(2)} [/tex]Hope it is helpful...Please help and thank you
Answer:
2.7>217/100
Step-by-step explanation:
Determine the principal value of the function Arcsin(sqrt3/2) (edg)
Answer:
Step-by-step explanation:
You have to be very careful how you put that into your calculator. You need brackets.
2nd function
sin-1
(
3
y^x or x^y or ^
.5
down arrow (if needed)
divide
2
)
= You should get 60
a ladder 12 m long just reachese the roof of a building.if the ladder makes an angle of 60° with the building,find the height of building.
Answer:
x/12 = sin(60°)
so x = 12 × 0.86602540378
x = 10.3923048454 m ~ 10.4 m ~ 10m
Hope it helps