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3 years ago

Please help me with these questions! Thx! :)

1 answer:

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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Marianna [84]

Answer:

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

The alternative hypothesis is accepted at a 0.05 level of significance

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

Step-by-step explanation:

Step:-1

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.

sample proportion

$p^{-} = \frac{x}{n} = \frac{52}{100} = 0.52$

Step:-2

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

μ < 0.64

Alternative Hypothesis:H₁: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

Level of significance = 0.05

Z₀.₀₅ = 2.326

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

Final answer:-

The null hypothesis is rejected at a 0.05 level of significance

The alternative hypothesis is accepted at a 0.05 level of significance

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3 years ago

Help meeeeeee its all due toad

solniwko [45]

Well, the answer would bee 1/10 for a simple reason: the 3 in 7.315 is in the tenth's spot while the 3 in 893.5 is in the ones. a one spot different that can be proven with logic.

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