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Karo-lina-s [1.5K]
2 years ago
14

This is really hard pls Help whats 9+10 ​

Mathematics
2 answers:
sveticcg [70]2 years ago
7 0

Answer:

its 19 eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeez

kupik [55]2 years ago
3 0

Answer:

why does everyone ask the same question o-o

<em>it's 21-</em>

<em>Hope this helps :]</em>

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Pleaseeeeeeee help me
lorasvet [3.4K]

Answer:

by my best guess, x = -5 (negative five)

Step-by-step explanation:

3 0
3 years ago
Six groups of students sell 162 balloons at the carnival .there are 3 students in each group. if each student sells the same num
Len [333]
It should be 54 because you half to divide 162 by 3


4 0
3 years ago
Which of the following expressions is written in simplest form
nadya68 [22]

Answer: I x^2 y^3 z

Step-by-step explanation:

This is the one most simplified. I’ll tell you why the others are incorrect.

F) 3^5 x^2 can be simplified. 3^5= 243. The simplified answer would be 243 x^2

G) (5y)^3= 125y^3

H) a^0 b (^0= 1 always) -> ab

Hope this helps!

3 0
3 years ago
Determine the number of gallons of gas that your car holds. Find the cost of the type of gasoline that your car uses at a local
Alex17521 [72]

16 gallon tank, 2.75 $/gal so roughly 53.25


3 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
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