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Shtirlitz [24]
3 years ago
10

The price of a watch was increased by 20% to £198. What was the price before the increase?

Mathematics
1 answer:
Semenov [28]3 years ago
5 0

Answer:

165

Step-by-step explanation:

198/1.2 = 165

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X is a normally Distributed random variable with a standard deviation of 4.00. Find the mean of X when 64.8% of the area lies to
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Answer:

7

Step-by-step explanation:

σ = 4 ; μ =?

8.52 to the left of X

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P(X < 8.52) = 64.8%

P(X < 8.52) = 0.648

Using the Z relation :

(x - μ) / σ

P(Z < (8.52 - μ) / 4)) = 0.648

The Z value of 0.648 of the lower tail is equal to 0.38 (Z probability calculator)

Z = 8.52 - μ / 4

0.38 = 8.52 - μ / 4

0.38 * 4 = 8.52 - μ

1.52 = 8.52 - μ

μ = 8.52 - 1.52

μ = 7

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3 years ago
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san4es73 [151]

Answer:

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Step-by-step explanation:

Is the answer

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3 years ago
Who is tokugawa shogun??his regime?​
KatRina [158]

Answer:

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Step-by-step explanation:

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a strawberry cake is cut into three pieces. The Arc measures of all three pieces are congruent. What is the measure of angle XYZ
masya89 [10]

Answer:

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3 years ago
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