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Iteru [2.4K]
3 years ago
6

How much would something cost if it was $20 but was 1/5 percent off??

Mathematics
2 answers:
muminat3 years ago
7 0
$16
Cuz 1/5 of 20 is 4.
It is 4 dollars off.
QveST [7]3 years ago
6 0
4$ would be the cost of the item
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john and jack found a coin on the sidewalk. they argued about whether the coin is fair. john claimed a 40% chance for the coin t
expeople1 [14]

Since it is observed that I z I = 3.464 > 1.96 it is concluded that the null hypothesis is rejected.

Therefore we reject John's claim.

Here:

we can use 1 sample proportion test to check the claim of John

H₀ : p₀ = 0.4

H₁ : p₀ ≠ 0.4

Test statistic is

z = p - p₀/√p₀(1-p₀)n

Let X be the random variable denoting the number of heads.

Now p = X/n

= 8/50

= 0.16

p₀ = 0.4

1-p₀ = 1-0.4

= 0.6

z = -3.464

since it is observed that I z I = 3.464 > 1.96 it is concluded that the null hypothesis is rejected.

Therefore we reject John's claim.

Learn more about Null hypothesis here:

brainly.com/question/15980493

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6 0
1 year ago
Write an equation of a line (-4,-1) and is perpendicular to the line y=4/3x+6<br> y =
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Answer:

y= -3/4x-2

Step-by-step explanation:

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m= -3/4

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y-(-1)= -3/4(x-(-4))

y+1= -3/4(x+4)

y+1= -3/4x -3

y= -3/4x-2

5 0
2 years ago
Answer correctly for brainly (not 4
vaieri [72.5K]

Hello there again. I have your answer: Solve for x by simplifying both sides of the equation, then isolating the variable. x = −8

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2 years ago
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I hope this helps you :)

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3 years ago
Will give brainiest
motikmotik

They hiked 2.02 kilometers in all because 1.08 + 0.94 = 2.02

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