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ANTONII [103]
2 years ago
10

|3 + x| = 5 Solve for x

Mathematics
2 answers:
Elodia [21]2 years ago
8 0

∑ Hey, richiebustamante90 ⊃

Answer:

x = -8 or x = 2

Step-by-step explanation:

<u>→ Given ← :</u>

|3 + x| = 5

<u>→ Solution ← :</u>

Applying absolute rule ~:  \mathrm{If}\:|u|\:=\:a,\:a > 0\:\mathrm{then}\:u\:=\:a\:\quad \mathrm{or}\quad \:u\:=\:-a

Thus we have;    3+x=-5\quad \mathrm{or}\quad \:3+x=5

Solving each:

3+x=-5

3x-3=-5-3

x=-8

3+x=5

3-3+x=5-3

x=2

Hence, x=-8\quad \mathrm{or}\quad \:x=2

<u><em>xcookiex12</em></u>

<u><em></em></u>

<em>8/22/2022</em>

bearhunter [10]2 years ago
5 0

Answer:

x = - 8 , x = 2

Step-by-step explanation:

the absolute value function always gives a positive result, however, the expression inside can be positive or negative, , that is

x + 3 = 5 ( subtract 2 from both sides )

x = 2

or

-(3 + x) = 5

- 3 - x = 5 ( add 3 to both sides )

- x = 8 ( multiply both sides by - 1 )

x = - 8

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Fynjy0 [20]

Answer:

We conclude that the proportion of adults who totally abstain from alcohol​ has changed.

Step-by-step explanation:

We are given that in 1943​, an organization surveyed 1100 adults and​ asked, "Are you a total abstainer​ from, or do you on occasion​ consume, alcoholic​ beverages?"

Of the 1100 adults​ surveyed, 429 indicated that they were total abstainers. In a recent​ survey, the same question was asked of 1100 adults and 352 in

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           n = sample of adults surveyed = 1100

So, <u><em>test statistics</em></u>  =  \frac{0.32-0.39}{\sqrt{\frac{0.32(1-0.32)}{1100} } }  

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The value of z test statistics is -4.976.

<em>Now, at 0.10 significance level the z table gives critical values of -1.645 and 1.645 for two-tailed test.</em><em> </em>

<em>Since our test statistics doesn't lie within the range of  critical values of z, so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region due to which </em><em><u>we reject our null hypothesis</u></em><em>.</em>

Therefore, we conclude that the proportion of adults who totally abstain from alcohol​ has changed.

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