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Savatey [412]
3 years ago
12

4x≤12= I don't understand​

Mathematics
2 answers:
olga55 [171]3 years ago
8 0

Answer:

x ≤ 3

Step-by-step explanation:

Just divide both sides by 4, the sign stays the same because you're dividing by a positive number

cluponka [151]3 years ago
6 0

Answer:

its x ≤ 3

Step-by-step explanation:

<em>               4x≤12</em>

4x/4 ≤ 12/4 divide both sides by 4

that will give you x≤3.

So, that means x is less than or equal to 3.

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Can you please simplify -2x-8x
sergij07 [2.7K]

Answer:

- 10x

Step-by-step explanation:

Step 1:

-2x - 8x

Answer:

- 10x

Hope This Helps :)

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How can i cancel my subscription
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Answer:

account settings

Step-by-step explanation:

visit your account settings and click cancel subscription

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Read 2 more answers
A 40-foot flagpole casts a 25-foot shadow. FInd the shawdow cast by a nearby building 200 feet tall.
zloy xaker [14]
Let s = shadow we are looking for.

40/200 = 25/s

Solve for s.

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8 0
3 years ago
What’s 20% as a fraction, 80% as a fraction and 15% as a fraction. Also, what I mean as a fraction is like 20
Ber [7]

Answer:

see below

Step-by-step explanation:

Percent means out of 100

20% = 20/100 which can be simplified

20/100   Divide by 10 on top and bottom

=2/10   Divide by 2 on top and bottom

= 1/5

80% = 80/100 which can be simplified

80/100  Divide by 10 on top and bottom

= 8/10  Divide by 2 on top and bottom

=4/5

15% = 15/100   Which can be simplified

15/100  Divide by 5 on top and bottom

= 3/20

4 0
3 years ago
A market research company conducted a survey to find the level of affluence in a city. They defined the category "affluence" for
malfutka [58]

Answer:

A 95% confidence interval for this population proportion is [0.081, 0.159].

Step-by-step explanation:

We are given that a market research company conducted a survey to find the level of affluence in a city.

Out of 267 persons who replied to their survey, 32 are considered affluent.

Firstly, the pivotal quantity for finding the confidence interval for the population proportion is given by;

                            P.Q.  =  \frac{\hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } }  ~ N(0,1)

where, \hat p = sample proportion of people who are considered affluent = \frac{32}{267} = 0.12

            n = sample of persons = 267

            p = population proportion

<em>Here for constructing a 95% confidence interval we have used One-sample z-test for proportions.</em>

<u>So, 95% confidence interval for the population proportion, p is ;</u>

P(-1.96 < N(0,1) < 1.96) = 0.95  {As the critical value of z at 2.5% level

                                                    of significance are -1.96 & 1.96}  

P(-1.96 < \frac{\hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } } < 1.96) = 0.95

P( -1.96 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } } < {\hat p-p} < 1.96 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } } ) = 0.95

P( \hat p-1.96 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } } < p < \hat p+1.96 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } } ) = 0.95

<u>95% confidence interval for p</u> = [ \hat p-1.96 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } } , \hat p+1.96 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } } ]

    = [ 0.12-1.96 \times {\sqrt{\frac{0.12(1-0.12)}{267} } } , 0.12+1.96 \times {\sqrt{\frac{0.12(1-0.12)}{267} } } ]

    = [0.081, 0.159]

Therefore, a 95% confidence interval for this population proportion is [0.081, 0.159].

4 0
3 years ago
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