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Ganezh [65]
3 years ago
14

Candy works on the 30th floor of an office building. She took the elevator to the cafeteria on the 7th floor. How many floors di

d she travel?
Mathematics
1 answer:
marishachu [46]3 years ago
8 0

Answer:

23 floors

Step-by-step explanation:

Subtract 7 from 30:

30 - 7

= 23

So, she traveled 23 floors.

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1 5/6 −(x− 7/12 )+2 1/12 =0.9
iren [92.7K]
The answer is x=3.6 or 3 3/5.

First we convert the decimal answer to a fraction; 0.9 is read as "nine tenths," so the corresponding fraction is 9/10:

1 5/6 - (x - 7/12) + 2 1/12 = 9/10

Now we find a common denominator.  The first thing that 6, 12 and 10 will all divide into is 60:

1 50/60 - (x - 35/60) + 2 5/60 = 54/60

Distributing the negative, we have:
1 50/60 - x + 35/60 + 2 5/60 = 54/60

Combining like terms, we have:
-x + 4 30/60 = 54/60

Subtracting 4 30/60 from each side, we have:
-x + 4 30/60 - 4 30/60 = 54/60 - 4 30/60
-x = -3 36/60

Divide both sides by -1:
-x/-1 = (-3 36/60)/-1
x = 3 36/60 = 3 3/5 = 3.6
5 0
3 years ago
First change to standard form of first order linear differential equation and then by finding the appropriate integrating factor
Leokris [45]

Answer:

Step-by-step explanation:

Given is a Differential equation as

xy' + y = lnx ; y(e)=1

To bring it to linear form we can divide the full equation by x

y'+\frac{y}{x} =\frac{ln x}{x}

This is of the form

y'+p(x) *y = q(x)

p(x) = 1/x

So find

e^{\int\limits{\frac{1}{x} } \, dx } = e^{ln x} = x

Solution is

xy = \int  {x*lnx /x } \, dx =xln x -x +C

Use the initial value as y(e) =1

e= eln e -e+C\\C=e

So solution is

xy =xln x -x+e

5 0
3 years ago
Which equation should be used to solve this problem?
dolphi86 [110]
Equation:

55 = x + (x+15)
6 0
3 years ago
Maya reads 1/8 of a newspaper in 1/20
yuradex [85]
So what are u trying to say here. She read in 1/20 of what, minutes, seconds, or what
5 0
3 years ago
A washer and a dryer cost $911 combined. The washer costs $39 less than the dryer. What is the cost of the dryer?
Gemiola [76]
$475 is the dryer, and the washer is $436
3 0
3 years ago
Read 2 more answers
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