1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
MAXImum [283]
3 years ago
11

Hannah can paint a room in 8 hours. Destiny can paint the same room in 6 hours. How long does it take for both Hannah and Destin

y to paint the room it they are working together?
Mathematics
1 answer:
Ksivusya [100]3 years ago
6 0

Answer:

3 hours 26 minutes

Step-by-step explanation:

1/8 + 1/6 = 1/t  where t is the required time in hours.

Multiply through by 24t:-

3t + 4t = 24

7t = 24

t = 3 3/7 hours

or  3 hours 26 minutes to the nearest minute.

You might be interested in
Prove: If a^2-a is even then a is even.
Alla [95]

This is not always true. Consider a=3. Then 3^2-3=9-3=6 is even, but a is odd.

6 0
3 years ago
If g(x) = 3x − 4, what is the value of g−1(g(13))?
Vsevolod [243]
The function g(x) = 3x-4 is a linear function. Therefore the inverse does exist (which is also linear)

Because we have an inverse, this means we can use the rule 
g^{-1}(g(x)) = x

Replace x with 13
g^{-1}(g(x)) = x
g^{-1}(g(13)) = 13

The answer is choice D

7 0
3 years ago
Read 2 more answers
Hannah plays bejeweled. She said that there are 28,036 daily users playing bejeweled and that number is 10 times less than the a
Virty [35]

Answer:

If your trying to find the amount of daily users playing FarmVille, it would be 280,360 daily users

3 0
2 years ago
Help me please I’ll give brainliest
Lady bird [3.3K]

Answer:

x=124

Step-by-step explanation:

Hope this helps

the whole is 180

180-48 is 132

132-8 = 124

4 0
2 years ago
Read 2 more answers
Hypothesis Testing for Means with Small Samples
Scorpion4ik [409]

Answer:

Step-by-step explanation:

Hello!

The variable of interest is

X: volume of root beer in a Windsor Bottling Company can.

A sample of n=24 cans was taken and their contents measured, resulting:

X[bar]= 11.4 oz

S= 0.62 oz

Assuming that the variable has a normal distribution X~N(μ;σ²), the parameter of interest is the average contents of the root beer cans of the Windsor Bottling Company (μ)

The claim is that the population mean content of the cans is different from 12 oz, symbolically: μ ≠ 12

The statistical hypothesis (Null and alternative) have to be complementary, exhaustive and mutually exclusive. The null hypothesis is the "no change" hypothesis and always carries the "=" sign.

If the claim is μ ≠ 12, its complement is μ = 12, the expression carrying the "=" sign will be the null hypothesis and its complement will be the alternative hypothesis:

H₀: μ = 12

H₁: μ ≠ 12

α: 0.05

To test the population mean of this normal population, you have to apply a one sample t-test, with statistic:

t= \frac{X[bar]-Mu}{\frac{S}{\sqrt{n} } } ~t_{n-1}

t_{H_0}= \frac{11.4-12}{\frac{0.62}{\sqrt{24} } } = -4.74

This test is two-tailed, using the critical value approach, you have to determine two rejection regions. Meaning, you'll reject the null hypothesis to small values of the statistic or to high values of the statistic.

t_{n-1;\alpha /2}= t_{23;0.025}= -2.069

t_{n-1;1-\alpha /2}= t_{23;0.975}= 2.069

The decision rule is:

If t_{H_0} ≤ -2.069 or if t_{H_0} ≥ 2.069, then you reject the null hypothesis.

If -2.069 < t_{H_0} < 2.069, then you do not reject the null hypothesis.

The value is less than the left critical value, the decision is to reject the null hypothesis.

Then you can say that with a 5% significance level, there is significant evidence to reject the null hypothesis, then the average amount of root beer of the Windsor Bottling Company is different from 12 oz, this means that the claim about the amount of root beer in the cans is correct.

I hope it helps!

6 0
3 years ago
Other questions:
  • Select the best answer for the question. 2. Identify the coefficient of −24x7y3 A. −24 B. 3 C. 24 D. −3
    14·2 answers
  • Dogwood Park is 30 yards long by 20 yards wide. Kylie is making plans to double the area by adding a strip at one end and anothe
    10·1 answer
  • What is the value of the expression 2 + 32 ⋅ (4 − 1)?
    7·2 answers
  • Suppose the radius of a circle is 7. What is its area?
    5·1 answer
  • GUYS PLEASE HELP ME PLEASE HELP ME PLEASE PLEASE!!!!!
    8·1 answer
  • If you want to buy an item in a store that costs $9.50 and is on sale for 25% off, then how much would the item actually cost yo
    10·2 answers
  • Anyone good at finding surface area and volume?
    10·1 answer
  • What is eight hundred sevnty seven times four
    14·1 answer
  • A girl weight increased by 12% between her tenth and four teen birthdays . If she weighed 45kg on her tenth birthday. What did s
    14·1 answer
  • Make a data display using the data from Problems 5-7.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!