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Leokris [45]
2 years ago
12

Evaluate - 1 - ( - z ) where z = -2

Mathematics
2 answers:
mr_godi [17]2 years ago
6 0
-1+z is the answers
shtirl [24]2 years ago
4 0

Answer:

-3

Step-by-step explanation:

To solve you replace the -z with 2 because the -2=z not -z. With the z in parenthesis being negative it basically means invers so you would put the invers or opposite of -2 in the parentheses.

-1-(2)

-1+-2

=-3

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Customers arrive at a restaurant according to a Poisson distribution at a rate of 20 customers per hour. The restaurant opens fo
jenyasd209 [6]

Answer:

0.087

Step-by-step explanation:

Given that there were 17 customers at 11:07, probability of having 20 customers in the restaurant at 11:12 am could be computed as:

= Probability of having 3 customers in that 5 minute period. For every minute period, the number of customers coming can be modeled as:

X₅ ~ Poisson (20 (5/60))

X₅ ~ Poisson (1.6667)

Formula for computing probabilities for Poisson is as follows:

P (X=ₓ) = ((<em>e</em>^(-λ)) λˣ)/ₓ!

P(X₅= 3) = ((<em>e</em>^(-λ)) λˣ)/ₓ! =  (e^-1.6667)((1.6667²)/3!)

P(X₅= 3) = (2.718^(-1.6667))((2.78)/6)

P(X₅= 3) = (2.718^(-1.6667))0.46

P(X₅= 3) = 0.1889×0.46

P(X₅= 3) = 0.086894

P(X₅= 3) = 0.087

Therefore, the probability of having 20 customers in the restaurant at 11:12 am given that there were 17 customers at 11:07 am is 0.087.

8 0
3 years ago
In a local shelter, 300 people donated blood during the blood donation week. The samples collected of the different blood types
Anna007 [38]

Answer:

D)24 people

Step-by-step explanation:

Total number of people, x=300

Number of people donated blood with type A, y

=\frac{28}{100}\times x\\=\frac{28}{100} \times 300\\=84

Number of people donated blood with type B, z

=\frac{20}{100}\times x\\=\frac{20}{100} \times 300\\=60

⇒Number of people with Type A blood donated more than those with Type B blood= y-z=84-60= 24

8 0
3 years ago
Read 2 more answers
What method would you use to solve -4x2 - 5x + 5=0
ipn [44]
Using the quadratic formula
5 0
2 years ago
Read 2 more answers
(look at the image) can i get help on this?
ser-zykov [4K]

Answer:

no u wont

Step-by-step explanation:

give money

6 0
3 years ago
Read 2 more answers
Find the distance between the points given.<br><br> (-3, 2) and (9, -3)<br><br> √(61)<br><br> √(37)
cricket20 [7]

Answer:

d=13.

Step-by-step explanation:

d=\sqrt{(x_{2}-x_{1} ) ^{2} +(y_{2}-y_{1} ) ^{2}}

From question statement, x_{1} =-3   ,x_{2} =9

y_{1} =2  ,y_{2} =-3

put above values in the distance formula,we obtain

d=\sqrt{(9-(-3))^{2}+(-3-2)^{2}}

d=\sqrt{(12)^{2}+(-5)^{2}}

d=\sqrt{144+25}

d=\sqrt{169}

d=13


8 0
3 years ago
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