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
Ivenika [448]
3 years ago
13

Please help me with this, aaaaaa

Mathematics
1 answer:
scoray [572]3 years ago
4 0

Answer:

3

Step-by-step explanation:

You might be interested in
Asap, sorry the pics kinda blurry
Vadim26 [7]
Here is all the work with it

3 0
2 years ago
you and three friends are going to a restaurant for dinner. you share three appetizers that cost $6 each. you also share two des
Mariulka [41]
3×6=$18
3×2=$6
total $24/3
each person paid $8
5 0
3 years ago
Help me out pretty please guys​
egoroff_w [7]
What do you need help with? There is no picture or anything so...
8 0
3 years ago
A sociologist wants to determine if the life expectancy of people in africa is less than the life expectancy of people in asia.
Colt1911 [192]

Answer:

The sample statistics are attached.

First, we need to determine the hypothesis.

The null hypothesis should be: H_{o} : u_{africa} \geq u_{asia}.

The alternative hypothesis should be: H_{a}: u_{africa}

The next step is about calculating the<em> t statistics </em>based on the samples. This <em>t test </em>will give the probability value or p-value, which determines if there's enough to reject the null hypothesis. The formula we need to use to find the t-value is: t=\frac{x_{1}-x_{2}  }{\sqrt{\frac{s_{1} ^{2} }{n_{1} } +\frac{s_{2} ^{2} }{n_{2} } } }

Replacing all the values into the formula, we have:

t=\frac{52.4-58.1}{\sqrt{\frac{(7.4)^{2} }{45}+\frac{(8.8)^{2} }{35}  } } \\t=\frac{-5.7}{\sqrt{1.2+2.2} } =\frac{-5.7}{1.8} =-3.2

Therefore, the t-value is -3.2.

Now, we using a level of significance of 0.01, and a degree of freedom (df) of 34, we use the t-table to find the p-value for this results. (df = N -1; in this case, we take the smaller sample, which is 35, giving us 34 of df).

Therefore, according to the table attached, <em>the p-value is less than 0.01,</em> which is less than our level of significance. This result means that the null hypothesis is rejected. In other words, there's enough evidence to say that <em>the life expectancy of people in Africa is less than the life of expectancy of people in Asia.</em>

<em></em>

3 0
3 years ago
What’s y of 2x+3y=7.20 and 4x+2y=8.80
Arturiano [62]

Answer:

(x,y)=(3/2,7/5)

Step-by-step explanation:

7 0
3 years ago
Other questions:
  • Nobu is making a bracelet with equal sections who makes 4/8 of the bracelet on Saturday and 2/8 of the bracelet on Sunday which
    10·1 answer
  • What number am I?
    8·2 answers
  • An isosceles triangle in which the two equal sides, labeled x, are longer than side y.
    9·2 answers
  • Solve by completing the square <br> X^2+12x-13=0
    13·1 answer
  • Se da triunghiul ABC isoscel , in care AB 2 lungimile de 5 cm respectiv 6 cm , calculati perimetrul ; sunt doua cazuri
    10·1 answer
  • Which of the following is a complex number?
    14·1 answer
  • Please answer this for me :)
    8·2 answers
  • Ms. Clayton took a survey of the students in her classes to see how many are likely to attend the school dance. She surveyed 48
    14·1 answer
  • 8x+1=-x-1 please help
    10·1 answer
  • It takes 5 minutes for 7 people to drink 25 pints of water.At this rate,how long would it take 15 people to drink 160 pints of w
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!