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3 years ago

I need help with math

Mathematics

2 answers:

Dmitrij [34]3 years ago

8 0

Answer:

x = 32cos(18) = 30.434

Step-by-step explanation:

Use the cosine function (adjacent / hypotenuse)

cos(18) = $\frac{x}{32}$

x = 32cos(18) = 30.434

*make sure your calculator is in degrees mode

fomenos3 years ago

5 0

Answer:

32(cos(18))=x

Step-by-step explanation:

cos(18)=x/32

32(cos(18))=x

Type in calculator for decimal answer.

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5. the price of an ipod dropped from $299.99 to $180.55. what was the percent decrease in price? (round to nearest hundredth per

max2010maxim [7]

If you would like to know what was the percent decrease in price, you can calculate this using the following steps:

x% of $299.99 is $180.55
x% * 299.99 = 180.55
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100% - 60.19% = 39.81%

The correct result would be 39.81%.

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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

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

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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.

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5 0

3 years ago

Can you kindly help me find the value of X? I've been getting it wrong and I need help to find out what I'm doing incorrect.

Maksim231197 [3]

There are 360 degrees. So add the 2 angles you have: 95+45=140. Subtract that from the number of degrees: 360-140=220. X=220 :)

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3 years ago

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konstantin123 [22]

<h3><u>Answer</u><u>:</u></h3>

Perimeter → 25cm

Area → 25.5cm²