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frez [133]
3 years ago
9

Desperate Please Hurry Up Will Mark Brainlist and Give Thanks x=10 y=25 z=20

Mathematics
1 answer:
amid [387]3 years ago
3 0

Answer:

Answer: 25

Step-by-step explanation:

We are given that

  • x = 10
  • y = 25
  • z = 20

We then input the values in the given equation:

\frac{x}{2} (y-z)

\frac{10}{2} (25-20)

Solve in the parenthesis first.

\frac{10}{2}(5)

Simplify the fraction.

5(5)

Multiply.

5* 5=25

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Answer:

Step-by-step explanation:

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3 years ago
You want to estimate the proportion of kids between the ages of 12 and 15 who have tried marijuana. You take a random sample of
kirill115 [55]
<h2>Answer with explanation:</h2>

Let p represents the population proportion.

By considering the given information, we have

H_0: p=0.29\\\\H_a: p\neq0.29

∵ the alternative hypothesis is two tailed , so the test is two-tailed test.

Given : For sample size :n= 130,  \hat{p}=0.23

Test statistic: z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}

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P-value (two -tailed test)=2P(z>|-1.51|)=0.1310434\approx 0.131

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Thus , we conclude that we have sufficient evidence to support the null hypothesis  that the true population proportion of Maryland students who have smoked marijuana is 29% .

5 0
3 years ago
It took my question down twice here's a real math question I guess
aliina [53]

Answer:

n-3

Interval notation: (-\infty, -10)\cup(-3,\infty)

Step-by-step explanation:

<u>First inequality:</u>

<u />n+8

Therefore, this inequality restricts:

n \in \mathrm{R};\: n

<u>Second inequality:</u>

< 8+n-3

Therefore, this inequality restricts:

n \in \mathrm{R};\: n>-3

Therefore, with both of these restrictions together, we have:

\fbox{$n \in \mathrm{R}; n-3$}\\\mathrm{or\:}\fbox{$n-3$}\\\mathrm{or\:}\fbox{$(-\infty, -10)\cup(-3,\infty)$}.

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AveGali [126]
X=-4 trust me this right
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Read 2 more answers
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