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3 years ago

Trejon rides his bike 2 1/4 Miles each day. Which equation can be used to find r, the number of miles he will ride in 8 days?

Mathematics

1 answer:

butalik [34]3 years ago

3 0

2 1/4 times 8 equals r

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The length of a rectangle is 4 more than 3 times the width if the perimeter of the rectangle is 18.4 cm what is the area of the

garik1379 [7]

Let's call the width: w

the lenght is then 3w+4 ("4 more than 3 times the width")

and the parameter would be 2(w+3w+4), that is 2*(4w+4), that is 8w+8.

this is also equal to 18.4:

8w+8=18.4
8w=10.4
w=1.3

this is the width, and the lenght is:
4+3*1,3=4+3.9=7.9

and the area is their product:
1.3*7.9=10.27

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3 years ago

Emergency 911 calls to a small municipality in Idaho come in at the rate of one every two minutes. Assume that the number of 911

nordsb [41]

Answer: a) 30, b) 0.2138, c) 0.0820

Step-by-step explanation:

Since we have given that

X be the number of calls in 1 hour = 60 minutes

Rate of one call every two minutes.

$\lambda=\dfrac{1}{2}$

(a) What is the expected number of 911 calls in one hour?

$\lambda=\dfrac{1}{2}\times 60=30$

(b) What is the probability of three 911 calls in five minutes? If required, round your answer to four decimal places.

$\lambda=\dfrac{1}{2}\times 5=2.5$

Number of calls = 3

So, P(X=3) is given by

$P(X=3)=\dfrac{e^{-\lambda}\lambda^x}{x!}\\\\P(X=3)=\dfrac{e^{-2.5}\times (2.5)^3}{3!}\\\\P(X=3)=0.2138$

(c) What is the probability of no 911 calls during a five-minute period? If required, round your answer to four decimal places.

$P(X=0)=\dfrac{e^{-2.5}(2.5)^0}{0!}=0.0820$

Hence, a) 30, b) 0.2138, c) 0.0820

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3 years ago

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Tanya [424]

Lol i dont know the answer but i love your profile pic again sorry

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A movie theater is open x hours Monday through Thursday and y hours Friday through Sunday. Write an algebraic expression that re

Georgia [21]

Answer: x+y

Step-by-step explanation:

Simple.

Since there is nothing splitting, all you need to do is add x and y.

To break it down:

They want to know the hours per week the theater is open. X represents the hours from Sunday to Thursday and Y represents hours from Friday to Sunday therefor all you need to do is add them because they represent Hours.

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Step-by-step explanation:

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