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3 years ago

I NEED HELP WHATS 1+1

Mathematics

2 answers:

Rus_ich [418]3 years ago

8 0

Answer: 2

Step-by-step explanation: This was very hard and I think i should deserve a million dollars for it

pochemuha3 years ago

7 0

<h3><em>Thank you for the point</em><em>:</em><em>)</em></h3>

<h2><em>Greetings from Turkey</em><em>:</em><em>)</em></h2>

<h2><em><u>#XBadeX</u></em></h2>

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Solve for the variable z to 4 = 8/5

Shkiper50 [21]

Answer:

Alright well solve for z by simplifying by both sides of the equation, then isolating the variable

Exact form: z = 2/5

Decimal form: o.4 Hope this helps :)

Step-by-step explanation:

5 0

3 years ago

Consider the following hypothesis test: H0: LaTeX: \mu_1-\mu_2=0μ 1 − μ 2 = 0 Ha: LaTeX: \mu_1-\mu_2\ne0μ 1 − μ 2 ≠ 0 The follow

Pavel [41]

Answer:

$z=\frac{104-\bar 106}{\sqrt{\frac{8.4^2}{80}+\frac{7.6^2}{70}}}}=-1.53$

Step-by-step explanation:

Data given and notation

$\bar X_{1}=104$ represent the mean for the sample 1

$\bar X_{2}=106$ represent the mean for the sample 2

$\sigma_{1} =8.4$ represent the population standard deviation for the sample 1

$\sigma_{2}=7.6$ represent the population standard deviation for the sample 2

$n_{1}=80$ sample size for the group 1

$n_{2}=70$ sample size for the group 2

z would represent the statistic (variable of interest)

Concepts and formulas to use

We need to conduct a hypothesis in order to check if the means for the two groups are the same, the system of hypothesis would be:

H0: $\mu_{1}-\mu_{2} =0$

H1: $\mu_{1} -\mu_{2} \neq 0$

If we analyze the size for the samples both are greater than 30 and we know the population deviations so for this case is better apply a z test to compare means, and the statistic is given by:

$z=\frac{\bar X_{1}-\bar X_{2}}{\sqrt{\frac{\sigma^2_{1}}{n_{1}}+\frac{\sigma^2_{2}}{n_{2}}}}$ (1)

z-test: Is used to compare group means. Is one of the most common tests and is used to determine whether the means of two groups are equal to each other.

Calculate the statistic

First we need to calculate the mean and deviation for each sample, after apply the formulas (2) and (3) we got the following results:

And with this we can replace in formula (1) like this:

$z=\frac{104-\bar 106}{\sqrt{\frac{8.4^2}{80}+\frac{7.6^2}{70}}}}=-1.53$

7 0

3 years ago

Find the slope and y-intercpet. (Hint: Rewrite the equation in slope-intercept form first.)

hichkok12 [17]

Answer

y=4x-3

m=4 or 4/1

b=-3

3 0

3 years ago

Solve for h. <br>what is h equal to?

Amanda [17]

Answer:

the last one

Step-by-step explanation:

.................

3 0

3 years ago

In a rectangle, the perimeter is 102 inches. The width of the rectangle is 9 inch more than half the

Harrizon [31]

perimeter = 2width + 2 length

102 = 2(x+9) + 2x

102 = 2x + 18 +2x

102 = 4x +18

84 = 4x

21 = x

Length = x = 21 inches

Width = x + 9 = 21 + 9 = 30 inches

7 0

3 years ago