20:8
Step-by-step explanation:
5:2
20:8
5×4= 20 and 2×4= 8
Answer:
A is the right answer. If you multiply the ratio 5: 2 by 4 it will give you 20:8
What is the value of x?
Answer:
X = 1
Step-by-step explanation:
X is none number but equals to 1
Answer:
X=11
Step-by-step explanation:
Similar triangles....
6/48 = 5/3x+7
6(3x+7) =240
3x+7=40
3x=33
x=11
Wake up and help me out thank youuuuu !!!!
Determine the slope of the line that is perpendicular to the line passing through the points (-6, 4) and (10,-2).
Answer:
The slope of the line that is perpendicular is 3/8
Step-by-step explanation:
The slope of the line through
(-6,4) (10,-2)
m = ( y2-y1)/(x2-x1)
= ( 10 - -6)/( -2 -4)
= (10+6)/(-2-4)
= 16/-6
=-8/3
A line perpendicular has a slope that is the negative reciprocal
- 1/( -8/3)
+ 3/8
The slope of the line that is perpendicular is 3/8
Jason is watering his garden. He uses 2.75 gallons of water each minute. How much
water does Jason use after watering his garden for 3 minutes?
Answer:
8,25
Step-by-step explanation:
Rewrite the equation below so that it does not have fractions. 4/9x-2=5/6
Answer:
0.44x-2=0.83
Step-by-step explanation:
Last year, 45% of business owners gave a holiday gift to their employees. A survey of business owners conducted this year indicates that 30% plan to provide a holiday gift to their employees. Suppose the survey results are based on a sample of 80 business owners.
(a) How many business owners in the survey plan to provide a holiday gift to their employees this year?
(b) Suppose the business owners in the sample do as they plan. Compute the p value for a hypothesis test that can be used to determine if the proportion of business owners providing holiday gifts has decreased from last year. If required, round your answer to four decimal places. If your answer is zero, enter "0". Do not round your intermediate calculations.
(c) Using a 0.05 level of significance, would you conclude that the proportion of business owners providing gifts has decreased? We the null hypothesis. We conclude that the proportion of business owners providing gifts has decreased from 2008 to 2009. What is the smallest level of significance for which you could draw such a conclusion?
Answer:
a)x₁ = 24 business owners plan to provide a gift this year
b) p-value = 0,0017
c)p-value < α we have to eject H₀ And support the claim that the proportion of business owners providing gifts has decrease
Step-by-step explanation:
a) Sample size 80
proportion p₁ = 30 % p₁ = 0,3
Then x₁ = 80*0,3
x₁ = 24 business owners plan to provide a gift this year
b) Hypothesis Test
Null Hypothesis H₀ p₁ = 0,45
Alternative Hypothesis Hₐ p₁ < 0,45
p₁ = 0,3 then q₁ = 1 - 0,3 q₁ = 0,7
z(s) = ( p₁ - 0,45 )/ √p₁* q₁ / n
z(s) = - 0,15 / √0,002625
z(s) = - 0,15 / 0,05123
z(s) = - 2,9279
b)From z-table we find p-value = 0,0017
c) If α = 0,05 ( significance level ) as
p-value < α we have to eject H₀ And support the claim that the proportion of business owners providing gifts has decrease
I WILL GIVE Brainiest IF YOUR RIGHT
Answer:
answer: 60
Hope that helps!
Answer:
G. 60 m²
Step-by-step explanation:
The lawn is in the shape of a trapezium.
The area of a trapezium can be found using the equation 0.5*h*(a+b), where h is the height and a and b are the top and bottom of the shape.
Area = 0.5*h*(a+b)
= 0.5*4*(12+18)
= 60 m²
Find the measure of angle w.'
5 points
wo
124°
О124
О 34
оооо
56
Answer:
56
Step-by-step explanation:
Angles w and 124 are linear pair angles,
w + 124 = 180
w = 180 - 124
w = 56
Find the measure of the angle indicated in bold
Plss help
Answer:
Solution given:
9x-4=8+7x[Vertically opposite angle]
9x-7x=8+4
2x=12
x=12/2
x=6
:.8+7x=8+7×6=50°
Answer:
50
Step-by-step explanation:
9x - 4 = 8 + 7x
x = 6
Therefore, 8 + (7 *6) = 50
The measure of the angle is 50
Thenks and mark me brainliest :)))
Find the surface area of this sphere.
Round to the nearest tenth.
10 cm
Formulas for Spheres
S.A. = 4rr2
V = firer
?] cm2
Enter
Answer:
the answer is 62.8cm^2
Step-by-step explanation:
4•3.14•5
By using the formula for the surface area of the sphere [tex]S.A = 4 \pi r^2[/tex], the surface area of this sphere would be, [tex]S.A = 314[/tex] cm²
Used the formula of the surface area of the sphere,
[tex]S.A = 4 \pi r^2[/tex]
Where 'r' is the radius of the sphere.
Given that,
Diameter of a sphere = 10 cm
We know that the radius of the sphere is half of the diameter of the sphere.
Hence, the radius of the sphere is,
[tex]r = \dfrac{10}{2}[/tex]
[tex]r = 5[/tex] cm
Substitute r = 5 cm in the above formula,
[tex]S.A = 4 \pi r^2[/tex]
[tex]S.A = 4 \times 3.14 \times 5^2[/tex]
Therefore, the surface area of a sphere is,
[tex]S.A = 314[/tex] cm²
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A fraction is shown. HHH 1 What fraction is shown on the number line? 5 O A 6. OB. 을 Ос. OD. ОЕ.
Answer:
huh?
Step-by-step explanation:
find the margin of error to use for this sample mean sushi based on a sample of 35 people he average out of pieces of sushi a person can eat is 16 pieces with a standard deviation of 8 pieces of sushi .constructs 90% confidence interval for the mean of amount of sushi pieces a person can eat statistics
Answer:
{13.7756,18.2244}
Step-by-step explanation:
Given the sample size, the margin of error can be calculated with the formula [tex]M=Z*\frac{\sigma}{\sqrt{n}}[/tex] where Z is the critical value for the desired confidence level, σ is the population standard deviation, and n is the sample size. Therefore, our margin of error for a 90% confidence level is:
[tex]M=Z*\frac{\sigma}{\sqrt{n}}=1.645*(\frac{8}{\sqrt{35}})=2.2244[/tex]
The formula for a confidence interval is [tex]CI=\bar{x}+M[/tex] where x-bar is the sample mean. Therefore, the 90% confidence interval for the mean amount of sushi pieces a person can eat is:
[tex]CI=\bar{x}\pm[M]=16\pm2.2244={13.7756,18.2244}[/tex]
Therefore, we are 90% confident that the true mean amount of sushi pieces a person can eat is contained within the interval {13.7756,18.2244}
.
Mrs Tan packed 42 strawberry cookies and 49 chocolate cookies in boxes
such that each box had an equal number of each type of cookies. What was
the greatest number of boxes used if all the cookies were packed?
Answer:
6 boxes
Step-by-step explanation:
HCF of 42 and 49 gives us 7.
So, 7 is the greatest number of boxes used if all cookies were packed.
Mark me brainliest thenkss :)
If the amount of time to prepare and deliver a pizza from MOD PIZZA is normally distributed with a mean of 20 minutes and standard deviation of 5 minutes.
Determine the percent of pizzas that were prepared and delivered:
(a) Between 20 and 25 minutes (b) In less than 18 minutes
( c ) If MOD PIZZA advertises that the Pizza is free if it takes more than 30 minutes to deliver, what percent of the pizza will be free?
I need to answer a,b and c - it is not mutiple choice. I also need to show all relevant steps and plus I really want to understand how to do this! I am completely stuck on this one and its due tonight. Please help!! :) Ill give badges, brainliest, thanks, all of that for whoever can help me!
Using the normal distribution, we have that:
a) 34.13% of pizzas were prepared and delivered between 20 and 25 minutes.
b) 34.46% of pizzas were prepared and delivered in less than 18 minutes.
c) 2.28% of the pizza will be free.
Normal Probability DistributionThe z-score of a measure X of a normally distributed variable with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex] is given by:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
The z-score measures how many standard deviations the measure is above or below the mean. Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.The mean and the standard deviation are given, respectively, by:
[tex]\mu = 20, \sigma = 5[/tex]
For item a, the probability is the p-value of Z when X = 25 subtracted by the p-value of Z when X = 20, hence:
X = 25:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]Z = \frac{25 - 20}{5}[/tex]
Z = 1
Z = 1 has a p-value of 0.8413.
X = 20:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]Z = \frac{20 - 20}{5}[/tex]
Z = 0
Z = 0 has a p-value of 0.5.
0.8413 - 0.5 = 0.3413.
Hence 34.13% of pizzas were prepared and delivered between 20 and 25 minutes.
For item b, the probability is the p-value of Z when X = 18, hence:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]Z = \frac{18 - 20}{5}[/tex]
Z = -0.4
Z = -0.4 has a p-value of 0.3446.
34.46% of pizzas were prepared and delivered in less than 18 minutes.
For item c, the proportion is one subtracted by the p-value of Z when X = 30, hence:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]Z = \frac{30 - 20}{5}[/tex]
Z = 2
Z = 2 has a p-value of 0.9772.
1 - 0.9772 = 0.0228, hence 2.28% of the pizza will be free.
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easy 5th grade math please look at photo and show work. Giving brainliest!!
Answer:
D) 13 1/8
Step-by-step explanation:
105/8=13 1/8 cups
Hope this helped! :)
The Jones brother, Carl, Cameron, and Carlos, are painters. Together they can paint a standard sized room in 2 hours. If Carl is alone on the job he can paint the room in 5 hours. If Cameron is alone he can paint the room in 6 hours.
Answer: Best anwser 5.5
Step-by-step explanation:
A plumber charges a $5 fee plus $12 per hour for labor. Which equation models the total cost
of a job?
Answer: y = 12x + 5
Step-by-step explanation:
Since the going rate is $12/hr, that will be the x coefficient. Since the starting fee is $5, that will be the y-intercept.
the highest possible score on an entrance exam is 800 points. what scores are between 80% to 90% of the highest possible score?
Answer: 640-720
Step-by-step explanation:
The perimeter of the traingle below is 8x-6
How does math anxiety affect working memory, and why do such changes in
working memory interfere with math performance?
PLEASE HELP I DON"T UNDERSTAND
SHOW WORK PLEASE
Part A: The area of a square is (9a2 − 24a + 16) 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 (25a2 − 36b2) square units. Determine the dimensions of the rectangle by factoring the area expression completely. Show your work. (5 points)
Answer:
Below in bold.
Step-by-step explanation:
Part A.
9a^2 - 24a + 16
= (3a - 4)(3a - 4).
Length of each side = 3a - 4 units.
Part B.
25a^2 − 36b^2
= (5a - 6b)(5a + 6b).
The dimensions are 5a-6b and 5a+6b.
The length of each side would be 3a - 4 units. The dimensions are 5a - 6b and 5a + 6b.
What is the area of the rectangle?The area of the rectangle is the product of the length and width of a given rectangle.
The area of the rectangle = length × Width
Part A.
The area of a square is [tex]9a^2 - 24a + 16[/tex] square units.
To determine the length of each side of the square by factoring the area expression completely.
[tex]9a^2 - 24a + 16\\\\= (3a - 4)(3a - 4).[/tex]
The Length of each side = 3a - 4 units.
Part B.
The area of a rectangle is [tex]25a^2 - 36b^2[/tex]square units.
To determine the dimensions of the rectangle by factoring the area expression completely.
[tex]25a^2 - 36b^2\\= (5a - 6b)(5a + 6b).[/tex]
The dimensions are 5a - 6b and 5a + 6b.
Learn more about the area;
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Please tell me if any are wrong. Thankyou. I will give brainliest
Answer:
Those are all correct!
Step-by-step explanation:
Great Work! Have a Nice Day!
Answer:
nope ur good
Step-by-step explanation:
but the 4th one is wrong
Events A and B are mutually exclusive. Events B and C are non-mutually exclusive. Which Venn diagram could represent this description? Circles A, B, and C overlap. Circles A and B overlap. Circle C is to the side. Circles A, B, and C are shown. They do not overlap. Circles A and C overlap, and circles C and B overlap.
Answer:
correct its d
Step-by-step explanation:
helpppppppppppooooo :p
Answer:
1) c. 10
2) a. 1 and 18
3) d. 17
4) I think it's actually 12 but I don't know
Four classmates collect data by conducting a poll. They
ask students chosen at random how many days a week
they stay after school for clubs.
• Zach interviews 100 students.
• Alyssa interviews 65 students.
• Olivia interviews 75 students.
• Ryan interviews 45 students.
Whose results are probably the most trustworthy?
A. Ryan's
B. Olivia's
C. Zach's
D. Alyssa's
Answer:
C, he interviewed the most people.
Brainliest please!
Answer:
C. Zach's
Step-by-step explanation:
HELP ME PLEASEEEEEEEEEEE
Answer:
12
Step-by-step explanation:
12/2=6
Tell me if it works
Answer: z=12
Step-by-step explanation: Hope this help :D
Ms. A. Lee is an advisor for the Walton College of Business and she is often asked by students what they should major in if they want to make a lot of money. Of course, her bias was to recommend the Walton College, but in order to make this recommendation with some evidence behind her she conducted a study in which she compared salaries (6 years after graduation) for a random sample of U. of A. graduates. She divided them into 2 groups: those who graduated from the Walton College and those who had any other major in the university. She entered her data into an Excel spreadsheet as illustrated below.
Walton Alumni Non-Walton Alumni
78000 45000
74000 54000
70000 52000
89000 41000
1. What is the independent variable in this scenario?
2. What is the dependent variable in this scenario?
3. How would you describe the research design in this scenario?
4. Assume Ms. A. Lee concluded there was no difference in salaries between colleges (Walton or Non-Walton), how many conditions to infer causation have been met?
Answer:
1. college
2, salary
3. true experiment
4. 2
Step-by-step explanation:
1. in this scenario the independent variable is the college. that is either walton college or non walton.
2. the dependent variable is the variable of interest. And this is salary. Students want to know what to major in that can give them a lot of salary when they start working.
3. This is a true experiment due to the random sample assigned.
4. 2 conditions to infer causation have been met.
What is the perimeter of the shape below
Answer:
Show the shape.
Step-by-step explanation:
Answer:
You didn't attach any work.
A baker is making apple pies. He uses 24 apples for every 5 pies. How many apples will he need to bake 20 pies?
Evaluate 20 + 6x when x = 0.
Answer:
If x=0 then the answer is 20.
Step-by-step explanation:
Answer:
20
Step-by-step explanation:
6x0 = 0 so 20 plus 0 = 20 when x = 0 because x cancels out