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3 years ago

When a=3 and b=4, what is the value of 7(a+2b)? Solved and worked out

Mathematics

1 answer:

geniusboy [140]3 years ago

8 0

Answer:

Step-by-step explanation:

7 (3 + 2*4) =

7 (3 + 8) =

7 (11) =

7 * 11 =

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Which linear inequality is represented by the graph?

gulaghasi [49]

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Y < 3x+2

Step-by-step explanation:

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3 years ago

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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

$\alpha = 100 - 90$

$\alpha = 10\%$

$\alpha = 0.10$

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

$Z_{\frac{\alpha }{2} } =Z_{\frac{0.10}{2} } = 1.645$

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

$P__{hat}} \pm E$

substituting values

$0.37 \pm 0.0348$

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3 years ago

Tony heard that housing expenses should

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Multiply the month;y income by the percentage:

8300 x 0.28 = 2324

He can spend $2,324 a month.

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3 years ago

Find AM in the parallelogram if PN=9 and AO=4

yaroslaw [1]

Diagonals of a parallelogram bisect each other. It is not relevant that PN=9. since AO=4 then AM=4

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3 years ago

45% of a number is 180. Find the number

KonstantinChe [14]

Answer:

Step-by-step explanation:

The term "of" can be translated to multiplication in problems like this.

So it's essentially saying multiply 45% to 180 and give me the result.

45% can be written as 45/100 in fractions (45 percent, where cent means 100 and per means division). 45/100 can be written as 0.45 in decimal form.

Now the problem reads 0.45 X 180. Using a calculator, we can solve this and the result comes out to be 81

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2 years ago

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