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kirill115 [55]
3 years ago
14

What is the sum of fifteen and ten?

Mathematics
1 answer:
IrinaK [193]3 years ago
3 0
The sum of two numbers means that you need to add (+) them together,
so the sum of 15 and 10 is 15 + 10
  

.   1 5
+<u>  1 0 </u>
    2 5

The answer is 25

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Write a linear equation with slope -1 and y intercept of 3
MatroZZZ [7]

Answer:

y = -x +3

Step-by-step explanation:

Think about the Y= mx + b

m = -1 so it's -x

b = 3, so it's +3

y intercept goes after the slope:

Y= Mx + B

Y = -x + 3

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Which statements are true? Check all that apply
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Read the paragraph, then go back and see which of the points match up and which don’t
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We are interested in conducting a study to determine the percentage of voters of a state would vote for the incumbent governor.
Vladimir [108]

Answer:

n=\frac{0.5(1-0.5)}{(\frac{0.05}{1.96})^2}=384.16  

And rounded up we have that n=385

Step-by-step explanation:

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 95% of confidence, our significance level would be given by \alpha=1-0.95=0.05 and \alpha/2 =0.025. And the critical value would be given by:

z_{\alpha/2}=-1.96, z_{1-\alpha/2}=1.96

The margin of error for the proportion interval is given by this formula:  

ME=z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}    (a)  

And on this case we have that ME =\pm 0.05 and we are interested in order to find the value of n, if we solve n from equation (a) we got:  

n=\frac{\hat p (1-\hat p)}{(\frac{ME}{z})^2}   (b)  

The estimated proportion for this case is \hat p=0.5. And replacing into equation (b) the values from part a we got:

n=\frac{0.5(1-0.5)}{(\frac{0.05}{1.96})^2}=384.16  

And rounded up we have that n=385

4 0
3 years ago
Please help me if you can, just click on the photo and you’ll see the question
irinina [24]

Answer:

18.

Step-by-step explanation:

If you divide by something less than 1, it'll wind up being more than what it was before.

7 0
3 years ago
Read 2 more answers
What is 3x=5x+9<br> btw im just giving out points but u can still answer
Leviafan [203]
The correct answer is -9/2
5 0
3 years ago
Read 2 more answers
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