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3 years ago

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Mathematics

1 answer:

svp [43]3 years ago

3 0

Answer:

Step-by-step explanation:

use the rule to figure it out.

y=5x-4

plug it in, starting with the first x input

5x turns into 5*0

5*0=0

0-4=-4

that narrows it down to 2 choices (A and B) with the first x input as -4

then continue

5x turns into 5*2

5*2=10

10-4=6

still working

last, 5x turns into 5*4

5*4=20

20-4=16

there is only one choice left that has the x values, -4 and 16

the answer is B. it's really not hard at all, you just plug it in. easy stuff. you got this!

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The 2010 General Social Survey reported a sample where about 48% of US residents thought marijuana should be made legal. If we w

Sati [7]

Answer:

The sample size is $n = 600$

Step-by-step explanation:

From the question we are told that

The sample proportion is $\r p = 0.48$

The margin of error is $MOE = 0.04$

Given that the confidence level is 95% the level of significance is mathematically represented as

$\alpha = 100 - 95$

$\alpha = 5 \%$

$\alpha = 0.05$

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

$Z_{\frac{\alpha }{2} } = 1.96$

The reason we are obtaining critical value of $\frac{\alpha }{2}$ instead of $\alpha$ is because

$\alpha$ represents the area under the normal curve where the confidence level interval ( $1-\alpha$ ) did not cover which include both the left and right tail while

$\frac{\alpha }{2}$ is just the area of one tail which what we required to calculate the margin of error

Generally the margin of error is mathematically represented as

$MOE = Z_{\frac{\alpha }{2} } * \sqrt{ \frac{\r p(1- \r p )}{n} }$

substituting values

$0.04= 1.96* \sqrt{ \frac{0.48(1- 0.48 )}{n} }$

$0.02041 = \sqrt{ \frac{0.48(52 )}{n} }$

$0.02041 = \sqrt{ \frac{ 0.2496}{n} }$

$0.02041^2 = \frac{ 0.2496}{n}$

$0.0004166 = \frac{ 0.2496}{n}$

=> $n = 600$

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3 years ago

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Viktor [21]

It would be (2,1)
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3 years ago

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Answer:

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Step-by-step explanation:

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3 years ago

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3 years ago

Read 2 more answers

Tom and Jane left for school, Tom walked to school on route A which was 4.5 kilometers while Jane walked to school on route B wh

Aleonysh [2.5K]

Answer:

3.95 km

Step-by-step explanation:

The computation is shown below:

As both left for school

Tom walked to school on route A i.e. 4.50 kilometer

And, Jane walked to school on route B i..e 8 kilometers & 450 meters i.e. 8.45 kilometers

So, the more km that jane would take to reach to school as compared with Tom is

= 8.45 km - 4.50 km

= 3.95 km

4 0

3 years ago