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2 years ago

Hi can someone help

Mathematics

1 answer:

DaniilM [7]2 years ago

4 0

Answer:

1/10 or 10%

Step-by-step explanation:

The number of outcomes is 10.

There is one outcome with (1, H).

Required probability is:

P(1, H) = 1/10 or 0.1 or 10%

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14k²+49k+21 factorise<br>

irina [24]

Answer:

(2k+1)(k+3)

Step-by-step explanation:

14k²+49k+21

simplify by dividing the whole equation by 7

2k²+7k+3

factorise

(2k+1)(k+3)

6 0

3 years ago

Find the value of p .<br><br>(√n)to the power p equal to<br> n

Allushta [10]

Answer:

p=2

$\sqrt{x} * \sqrt{x} = x$

$\sqrt{n} *\sqrt{n} = n$

$\sqrt{n} ^{2} = n$

$\sqrt{n} ^{p} = n$

SO.... P = 2

Step-by-step explanation:

4 0

3 years ago

Ashton made contributions to a Roth IRA over the course of 32 working years. His contributions averaged $2,400 annually. Ashton

MissTica

<span>If Ashton made contributions to a Roth IRA over the course of 32 working years, then his contributions averaged $2,400 annually, and Ashton was in the 28% tax bracket during his working years, then the annual compounding will be 6% or .06.</span>

6 0

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

$z=\dfrac{0.23-0.29}{\sqrt{\dfrac{0.29(1-0.29)}{130}}}\\\\=-1.50762993902\approx-1.51$

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

Since , the p-value (0.131) is greater than the significance level (0.03), so we accept the null hypothesis.

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

Help me please help me

zlopas [31]

Answer:

m = -10.7

Step-by-step explanation:

m + 4.1 = -6.6

Subtract 4.1 from both sides:

m + 4.1 = -6.6

- 4.1 - 4.1

m = -10.7

Final answer: m = -10.7

Hope this helps!

6 0

3 years ago

Hi can someone help ​

Hi can someone help