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Yanka [14]
3 years ago
14

There 6 entrances to the haunted house. If you do not exit the same way you entered, how many different ways can you enter and e

xit the house?
Mathematics
2 answers:
zlopas [31]3 years ago
5 0
I believe 30, because there are six ways in and five ways out, five because you can't go back through the same entrance. So six times five is thirty.
7nadin3 [17]3 years ago
4 0

Answer: 30

Step-by-step explanation:

Given: The number of entrance to the haunted house= 6

Also we can not exist from the same way of entrance.

Then the number of choices of exit will be 5.

Now, the number of different ways you can enter and exit the house = 6\times5=30

Hence, the number of different ways you can enter and exit the house = 30

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Step-by-step explanation:

4/6 * 30

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3 years ago
Sophie and Simon are peeling a pile of potatoes for lunch in the cafeteria. Sophie can peel all the potatoes by herself in 45 mi
tensa zangetsu [6.8K]
Short Answer: 18 minutes
Remark

The answer to this problem is less than the smallest time of the two people working together. that fact lets out C and D (38 minutes and 75 minutes). Now you have to choose 15 minutes and 18 minutes. There's a method. No guessing needed.

Givens
Let the time for Sophie = S
Let the time for Simon = M
Let the job to completion = 1 
S = 45 minutes
M = 30 minutes

Step One
Convert minutes to hours.
45 minutes = 45 / 60 = 3/4 hour = 0.75 hour
30 minutes = 30 / 60 = 1/2 hour = 0.50 hour

Step Two
Set up the Equation
The formula is a form of job / hour.
Let the time = t that they both have to work

job = 1 in these problems.
1/S + 1/M = 1/t
1/0.75 + 1/0.5 = 1/t

Solve
1 ÷ 0.75 = 1.33333
1 ÷ 0.5 = 2

1.3333 + 2 = 3.33333 
3.3333 = 1 / t                    Multlply both sides by t
3.3333*t = 1
t = 1 / 3.333333333
t = 0.3 of an hour


1 hour = 60 minutes
0.3 hours = x              Cross Multiply
x = 60 * 0.3
x = 18 minutes

Answer working together it took them 18 minutes  <<<<< 
6 0
3 years ago
Read 2 more answers
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beks73 [17]

Answer:

√75, 9, 9.5, √99, 10

Step-by-step explanation:

that's what I got

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Find (f+g)(x) when f(x)=3/x+5 and g(x)=2/x
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What does that 3/x and 2/x mean? 2x and 3x or x^2 and x^3?
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