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qwelly [4]
3 years ago
14

Solve the right triangle

Mathematics
1 answer:
____ [38]3 years ago
7 0

Answer:

C=5.831

a=30.964

b=59.036

Step-by-step explanation:

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A cubical block of metal weighs 6 pounds. How much will another cube of the same metal weigh if its sides are twice as long?
ser-zykov [4K]
I believe it would be 12, I believe this because its states that it is TWICE as long therefore is made from the same metal so 6x2=12 
8 0
3 years ago
The mean SAT score in mathematics, M, is 600. The standard deviation of these scores is 48. A special preparation course claims
kupik [55]

Answer:

Step-by-step explanation:

The mean SAT score is \mu=600, we are going to call it \mu since it's the "true" mean

The standard deviation (we are going to call it \sigma) is

\sigma=48

Next they draw a random sample of n=70 students, and they got a mean score (denoted by \bar x) of \bar x=613

The test then boils down to the question if the score of 613 obtained by the students in the sample is statistically bigger that the "true" mean of 600.

- So the Null Hypothesis H_0:\bar x \geq \mu

- The alternative would be then the opposite H_0:\bar x < \mu

The test statistic for this type of test takes the form

t=\frac{| \mu -\bar x |} {\sigma/\sqrt{n}}

and this test statistic follows a normal distribution. This last part is quite important because it will tell us where to look for the critical value. The problem ask for a 0.05 significance level. Looking at the normal distribution table, the critical value that leaves .05% in the upper tail is 1.645.

With this we can then replace the values in the test statistic and compare it to the critical value of 1.645.

t=\frac{| \mu -\bar x |} {\sigma/\sqrt{n}}\\\\= \frac{| 600-613 |}{48/\sqrt(70}}\\\\= \frac{| 13 |}{48/8.367}\\\\= \frac{| 13 |}{5.737}\\\\=2.266\\

<h3>since 2.266>1.645 we  can reject the null hypothesis.</h3>
6 0
3 years ago
Read 2 more answers
Please help with 7 :))
Maru [420]
What Is Your. Answer
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Help me plsss<br><br> And show identity. Thank you:)
zhuklara [117]

Answer:

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Step-by-step explanation:

change the first 2 brackets into cos sin like that

then after,change both into another formula

sin theta plus cos theta will come ans

4 0
3 years ago
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Solve the equations: <br> bx-c=ax+d
Paladinen [302]

Answer:

x =  \frac{c + d}{b - a}

Step-by-step explanation:

bx-c=ax+d

<=> bx-ax=c+d

<=> (b-a)x=c+d

<=> x=(c+d)/(b-a)

8 0
3 years ago
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