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3 years ago

You are on the 2nd floor, go down 3 floors, and back up 7 floors. On what floor are you on now? *

2 answers:

5 0

Movement in this problem can be thought as addition or subtraction. Going up a floor means taking your current floor and adding one. Same with going to a lower floor but with subtraction.

The first movement is going down the flight of stairs to reach the 2nd floor - 3.

Why are we using subtraction? Because we are going to a lower level.

2nd floor - 3 = -1 floor or some might consider this the basement.

Now, the next movement is going up 7 floors. This is going to be easy since we know what to do.

-1 floor + 7 = 6th floor

Hope this answer provides a clear explanation!

scZoUnD [109]3 years ago

3 0

Answer:

6th floor

Step-by-step explanation:

2-3+7

-1+7

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Simplify this expression.

amm1812

Answer: 0.88

Step-by-step explanation:

Okay -5.37 + 8.14 = 2.77 ( you can simply plug this into the calculator or you could switch the problem around so it’s 8.14 - 5.37, either way you’ll get 2.77)

And then you take 2.77 -1.89 = 0.88

So 0.88 is your answer

7 0

2 years ago

Spam e-mail containing a virus is sent to 1000 e-mail addresses. After 1 second, a recipient machine broadcasts 10 new spam e-ma

pickupchik [31]

Answer:

Answer explained below

Step-by-step explanation:

Spam e-mail containing a virus is sent to 1000 e-mail addresses. After 1 second, a recipient machine broadcasts 10 new spam e-mails containing the same virus, after which the virus disables itself on that machine. (1) Write a recursive definition (i.e. recurrence relation) to show how many spam emails will be sent out after n seconds. (2) Solve the recurrence relation. (3) How many e-mails are sent at the end of 20 seconds

1.START T=0.....

1000 EMAILS SENT AND RECEIVED BY 1000 M/CS.

T=1.....

EACH OF THE M/C SENDS 10 NEW MAILS ....

.................................

LET M[N] BE THE NUMBER OF MAILS SENT OUT AFTER N SECONDS.

SO , EACH OF THESE M/CS WILL SEND 10 MAILS IN NEXT 1 SECOND.

HENCE NUMBER OF MAILS SENT IN N+1 SECONDS=M[N+1]=

M[N+1]=10*M[N].......................1

THIS IS THE RECURRENCE RELATION.....

2.SOLUTION .....

M[N+1]=10M[N]=10*10M[N-1]=10*10*10M[N-2]=........

M(N+1)=[10^1][M(N)]=[10^2][M(N-1)]=[10^3][M(N-2)]=..........=[10^N][M(1)]=[10^(N+1)][M(0)]

M[N+1]=[10^(N+1)][1000]=[10^(N+1)][10^3]=[10^(N+4)]......................................2

THIS IS THE NUMBER OF MAILS SENT AFTER N+1 SECONDS .....OR ....

M[N]=[10^(N+3)].............................................3

..................IS THE SOLUTION FOR NUMBER OF MAILS SENT AFTER N SECONDS.....

3.AFTER N=20 SECONDS , THE ANSWER IS ....

M[20]=10^(20+3)=10^23

8 0

3 years ago

Read 2 more answers

Jane has a pre-paid cell phone with Splint. She can't remember the exact costs, but her plan has a monthly fee and a charge for

yan [13]

Answer:

The costs of the plan are $0.15 per minute and a monthly fee of $39

Step-by-step explanation:

Let

x ----> the number of minutes used

y ----> is the total cost

step 1

Find the slope of the linear equation

The formula to calculate the slope between two points is equal to

$m=\frac{y2-y1}{x2-x1}$

we have the ordered pairs

(100,54) and (660, 138)

substitute

$m=\frac{138-54}{660-100}$

$m=\frac{84}{560}=\$0.15\ per\ minute$

step 2

Find the equation of the line in point slope form

$y-y1=m(x-x1)$

we have

$m=0.15\\point\ (100,54)$

substitute

$y-54=0.15(x-100)$

step 3

Convert to slope intercept form

Isolate the variable y

$y-54=0.15x-15\\y=0.15x-15+54\\y=0.15x+39$

therefore

The costs of the plan are $0.15 per minute and a monthly fee of $39

6 0

3 years ago

Mr. Morales purchases supplies for his classroom and the science department. Mr. Morales purchases 6 boxes of pencils, 12 boxes

OLga [1]

Answer:

522.60, hope that helps! (UwU)=/

Step-by-step explanation:

pencils: $4.10 * 6 ===> $24.60

pens: $6.50 * 12 ===> $78

notebook paper: $105 * 4 ===> $420

pencils + pens + notebook paper = total cost

24.60 + 78 + 420 = 522.60

4 0

3 years ago

Read 2 more answers

Smith and his friends are gaming online on a popular website. An hour later, 6 friends go offline. Five of them continue playing

loris [4]

Answer:11 people

Step-by-step explanation:

5 0

2 years ago