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8_murik_8 [283]
3 years ago
11

Please help me with these questions! Thx! :)

Mathematics
1 answer:
AveGali [126]3 years ago
8 0
Hey there,

148 = 2x + 6(x + 10)

148 = 2x + 6x + 60

148 = 8x + 60
-60 - 60

88 = 8x
/8 /8

11 = x


6x + 4(-x - 14) = -42

6x -4x - 56 = -42

2x - 56 = -42
+ 56 + 56

2x = 14
/2 /2

x = 7


-101 = 7x -4(-3x - 8)

-101 = 7x + 12x + 32

-101 = 19x + 32
- 32 - 32

-133 = 19x
/19 /19

-7 = x

Hope I helped :)

~Char

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Answer:

<em>The calculated value  |Z| = |-2.5| >2.326 at 0.05 level of significance</em>

<em>The alternative hypothesis is accepted at a 0.05 level of significance</em>

The manager of  Publix in Clemson believes 64% is too high for his own store

Step-by-step explanation:

<u><em>Step:-1</em></u>

Given that the consumer Reports showed that 64% of supermarket shoppers.

Given that the population proportion

                                 P = 0.64

Given that random sample size 'n' = 100

Given that 52 believe the supermarket brands were as good as the national brands.

<em>sample proportion</em>

<em>                           </em>p^{-} = \frac{x}{n} = \frac{52}{100} = 0.52<em></em>

<u><em>Step:-2</em></u>

<u><em>Null hypothesis: </em></u>The manager of the Publix in Clemson believes 64% is too low for his own store

μ < 0.64

<u><em>Alternative Hypothesis:H₁:</em></u>μ > 0.64

Test statistic

               Z = \frac{p-P}{\sqrt{\frac{PQ}{n} } }

               Z = \frac{0.52-0.64}{\sqrt{\frac{0.64 X 0.36}{100} } }

              Z =  -2.5

<em>Level of significance = 0.05</em>

<em>Z₀.₀₅ = 2.326</em>

<em>The calculated value  |Z| = |-2.5| >2.326 at 0.05 level of significance</em>

<u><em>Final answer</em></u><em>:-</em>

<em>The null hypothesis is rejected at a 0.05 level of significance</em>

<em>The alternative hypothesis is accepted at a 0.05 level of significance</em>

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3 years ago
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solniwko [45]

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He fourth-grade students at Curtis Estabrook make up 0.3 of all students​ at the school. What fraction is equivalent to 0.3? ​
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Answer:

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Step-by-step explanation:

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The fraction is therefore equivalent to

= 3/10

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Answer:

No

Step-by-step explanation:

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