3 years ago

What is 228= -x + 72 what dose x =

Mathematics

1 answer:

aev [14]3 years ago

3 0

Answer:

216

Step-by-step explanation:

Adding something to a negative number is like subtracting from that number. So it is really 288=72-x. You get the answer by doing this, 288-72=216

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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

Which Expression is Equivalent to (f+g)(4)?

svp [43]

Step-by-step explanation:

$= (f + g)(4)$

$= f(4) + g(4)$

The answer is A.

3 0

2 years ago

Please help me with this

Leona [35]

The answer is associative property

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4 years ago

-x - 6=3. Help please

sergiy2304 [10]

I hope this helps you

-x=3+6

-x=9

x=-9

8 0

3 years ago

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Pls help asappppppppppp

dedylja [7]

Answer:

see below

Step-by-step explanation:

for 7, about 520/20 = 26

for 8, around 2,000/100= 20

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3 years ago

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