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3 years ago

How do you do this TwT

Mathematics

1 answer:

tangare [24]3 years ago

5 0

Answer:

Step-by-step explanation:

First step plug the numbers into the equation.

-10/(5+2) = (-10/5) + (-10/2)

Solve both sides of the equation separately.

-10/(5+2) Use distributive property, multiply both 5 and 2 by -10.

= -50 + (-20) = -70

-10/5 + -10/2 Multiply the fractions so they can be added together.

-10/5*2 = -20/10 -10/2*5 = -50/10

-20/10 + -50/10 = -70

Now you have solved both equations and they are both equal to -70, so you have verified that the equations are equal to each other because they both equal -70.

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Finding the median off 9,1,10,6,15,-5,1

Elena L [17]

Answer:

6 is the median of the example shown above

7 0

3 years ago

6!/0! a) 0 b) 2 c) undefined

Harman [31]

None of the above...

6 factorial is 720.

0 factorial is 1.

The correct answer is 720.

5 0

3 years ago

When 3010 adults were surveyed in a poll, 27% said that they use the Internet. Is it okay for a newspaper reporter to write th

tamaranim1 [39]

Answer:

Null hypothesis: $p=0.25$

Alternative hypothesis: $p \neq 0.25$

z=2.53

pv=0.0114

So based on the p value obtained and using the significance given $\alpha=0.05$ we have $p_v$ so we can conclude that we reject the null hypothesis, and we can said that at 5% of significance the proportion of people who says that they use the Internet differs from 0.25 or 25% .

Step-by-step explanation:

1) Data given and notation

n=3010 represent the random sample taken

X represent the people who says that said that they use the Internet.

$\hat p=\frac{X}{106}=0.27$ estimated proportion of people who says that said that they use the Internet.

$p_o=0.25$ is the value that we want to test

$\alpha$ represent the significance level

z would represent the statistic (variable of interest)

$p_v$ represent the p value (variable of interest)

2) Concepts and formulas to use

We need to conduct a hypothesis in order to test the claim that 50% of people who says that they would watch one of the television shows.:

Null hypothesis: $p=0.25$

Alternative hypothesis: $p \neq 0.25$

When we conduct a proportion test we need to use the z statisitc, and the is given by:

$z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}}$ (1)

The One-Sample Proportion Test is used to assess whether a population proportion $\hat p$ is significantly different from a hypothesized value $p_o$ .

3) Calculate the statistic

Since we have all the info requires we can replace in formula (1) like this:

$z=\frac{0.27 -0.25}{\sqrt{\frac{0.25(1-0.25)}{3010}}}=2.53$

4) Statistical decision

P value method or p value approach . "This method consists on determining "likely" or "unlikely" by determining the probability assuming the null hypothesis were true of observing a more extreme test statistic in the direction of the alternative hypothesis than the one observed". Or in other words is just a method to have an statistical decision to fail to reject or reject the null hypothesis.

We have the significance level provided $\alpha=0.05$ . The next step would be calculate the p value for this test.

Since is a bilateral test the p value would be:

$p_v =2*P(z>2.53)=2*(0.0057)=0.0114$

3 0

3 years ago

X+ 5

romanna [79]

Answer:

third option

Step-by-step explanation:

m(n(x)) =

$\frac{x - 3 + 5}{x - 3 - 1} = \frac{x + 2}{x - 4}$

the domain of this is R/(4)

so as the third option

3 0

4 years ago

Meagan wants to make 2 1/3 batches of muffins. The recipe calls for 1 1/2 cups of sugar per batch. How much sugar will she need?

wlad13 [49]

Answer:

1 5/9 OR 14/9

Step-by-step explanation:

First we need to find out what the question is asking. How much sugar will she need if she wants to make 2 1/3 batches?

Next, we must see if we need to divide, subtract, multiply, or add. We need to divide.

2 1/3 divided by 1 1/2

Convert mixed numbers to improper fractions: 2 1/3=7/3 1 1/3=3/2

Apply the fraction rule a/b/c/d=a*d/b*c: 7*2/3*3

14/9 OR 1 5/9

3 0

3 years ago