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3 years ago

What is the simplified expression for –3cd – d(2c – 4) – 4d?

Mathematics

2 answers:

bogdanovich [222]3 years ago

6 0

Answer:

$-5cd$

Step-by-step explanation:

$-3cd - d(2c - 4) - 4d$

To get simplified expression we use order of operation PEMDA

WE start with parenthesis. Distribute -d inside the parenthesis

$-3cd - 2dc +4d - 4d$

Now we combine like terms that has same variables

4d-4d becomes 0

Expression becomes

$-3cd - 2dc$ . Both terms has same variables so we add it

$-5cd$

ankoles [38]3 years ago

5 0

-5cd

I don't know if this is what you asked...hope it helped!

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3 years ago

An Article a Florida newspaper reported on the topics that teenagers most want to discuss with their parents. The findings, the

Sergio039 [100]

Answer:

The estimate is $P__{hat}} \pm E = 0.37 \pm 0.0348$

Step-by-step explanation:

From the question we are told that

The sample size is n = 522

The sample proportion of students would like to talk about school is $\r p__{hat}} = 0.37$

Given that the confidence level is 90 % then the level of significance can be mathematically evaluated as

$\alpha = 100 - 90$

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Next we obtain the critical value of $\frac{\alpha }{2}$ from the normal distribution table, the value is

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Generally the margin of error can be mathematically represented as

$E = Z_{\frac{\alpha }{2} } * \sqrt{\frac{\r P_{hat}(1- \r P_{hat} )}{n } }$

=> $E = 1.645 * \sqrt{\frac{0.37 (1- 0.37 )}{522 } }$

=> $E = 0.0348$

Generally the estimate the proportion of all teenagers who want more family discussions about school at 90% confidence level is

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3 years ago

Please help I am doing a test right now

sineoko [7]

Answer:

yeet

Step-by-step explanayeettion:

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3 years ago

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