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3 years ago

10

in a regular polygon each interior angle is 140 greater than each exterior angle calculate the number of sides of each polygon .

1 answer:

Elodia [21]3 years ago

6 0

Answer:

9

Step-by-step explanation:

Exterior sides = 180 - 140 = 40

number of sides = 360 / 40 = 9 sides

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The tread life of a particular brand of tire is a random variable best described by a normal distribution with a mean of 60,000

mel-nik [20]

Answer:

0.018 is the required probability.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 60,000 miles

Standard Deviation, σ = 1500 miles

We are given that the distribution of tread life is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

P(brand will last between 56,850 miles and 57,300 miles)

$P(56850 \leq x \leq 57300) = P(\displaystyle\frac{56850 - 60000}{1500} \leq z \leq \displaystyle\frac{57300-60000}{1500}) = P(-2.1 \leq z \leq -1.8)\\\\= P(z \leq -1.8) - P(z < -2.1)\\= 0.0359 - 0.0179 = 0.018= 1.8\%$

$P(56850 \leq x \leq 57300) = 1.8\%$

0.018 is the probability a certain tire of this brand will last between 56,850 miles and 57,300 miles.

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4 years ago

Math is so hard for no reason

Mashcka [7]

Answer: 0.12244898

Step-by-step explanation:

Find the square root of 36/49

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3 years ago

Which of the following are measures of complementary angles? A. 50° and 41° B. 100° and 80° C. 77° and 13° D. 35° and 10°

marysya [2.9K]

Complimentary angles equal 90 degrees. So the answer would be C because 77+13= 90.

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3 years ago

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There are 500 students in the 8th grade. 15 of those students were absent Friday. What percent of 8th graders were NOT absent on

ICE Princess25 [194]

15/500 x 100

1500/500 = 3 %

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3 years ago

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Solve for x, y, and all of the missing angles. d = (2y+2) c = (3y + 18) a 50° b = (2x + 4) b degrees b degrees . degrees d = deg

CaHeK987 [17]

Answer:

that answer was wrong your dum

Step-by-step explanation:

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3 years ago