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3 years ago

Luke buys 7 new pencils. Now he has 21 pencils. How many pencils did Luke have at first?

Mathematics

2 answers:

Alinara [238K]3 years ago

7 0

Answer:

21-7

Step-by-step explanation:

Luke had 14 pencil at first

Pani-rosa [81]3 years ago

5 0

Answer:

Step-by-step explanation:

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The number of accidents that occur at a busy intersection is Poisson distributed with a mean of 4.5 per week. Find the probabili

Mariana [72]

Answer:

a) 0.01111

b) 0.4679

c) 0.33747

Step-by-step explanation:

We are given the following in the question:

The number of accidents per week can be treated as a Poisson distribution.

Mean number of accidents per week = 4.5

$\lambda= 4.5$

Formula:

$P(X =k) = \displaystyle\frac{\lambda^k e^{-\lambda}}{k!}\\\\ \lambda \text{ is the mean of the distribution}$

a) No accidents occur in one week.

$P(x =0)\\\\= \displaystyle\frac{4.5^0 e^{-4.5}}{0!}= 0.01111$

b) 5 or more accidents occur in a week.

$P( x \geq 5) = 1-\displaystyle \sum P(x$

c) One accident occurs today.

The mean number of accidents per day is given by

$\lambda = \dfrac{4.5}{7} = 0.64$

$P(x =1)\\\\= \displaystyle\frac{0.64^1 e^{-0.64}}{1!}= 0.33747$

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3 years ago

What is 2.419 rounded to the nearest one?

Advocard [28]

Answer:

Step-by-step explanation:

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3 years ago

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If you were to locate 22/3 on a number line ,between which two intergers would it be located

Firdavs [7]

It would be 7 and 8 because if you divide 22/3 it equals 7.3. Hope that helps and so sorry if it’s wrong. If you need anymore help ask me ;)

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3 years ago

Confused on how to do this help m

pychu [463]

Answer:

Step-by-step explanation:

y=kx,where :k, is the constant

-4=6k

K=-4/6

y=(-4/6)x

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3 years ago

Greta uses 3 cups of pasta for every 3/4 cup of sauce. How many pasta does she use per cup of sauce?

Charra [1.4K]

12.

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3 years ago