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3 years ago

Please help i’m in a hurry

Mathematics

1 answer:

Wittaler [7]3 years ago

6 0

Answer:

the answer should be 18

Step-by-step explanation:

this isnt exactly hard when you get the first part with ST beeing 36 then you can just halve that and the answer is 18

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16 > - 8 + x A. x > 24 B. x < 24 C. x > 8 D. x < 8

xeze [42]

Answer:

B. x < 24

Step-by-step explanation:

16 > - 8 + x

+8 > +8 + x Add 8 to both sides

24 > x

Final answer: x < 24

6 0

3 years ago

Will give brainliest please helpppp

Mama L [17]

Its not the first two, I’m having trouble seeing those bottom two and what they are.

3rd one: y=ln x

7 0

3 years ago

What number is39% of 120

noname [10]

46.8 is 39% of 120. Hope this helped you!

4 0

3 years ago

Read 2 more answers

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

I need accurate answer please because this is the last attempt

matrenka [14]

Answer:

I'm not very sure, however I think you have to replace the sign - for a +.

Step-by-step explanation:

7 + 4√13

3 0

3 years ago