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Zina [86]
3 years ago
10

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

Mathematics
2 answers:
timama [110]3 years ago
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

6

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Answer:

16

Step-by-step explanation:

To solve this question,we will have to understand some symbols in mathematics...

For example,* means ×

/ Means÷

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2*2^3 means 2 multiply by 2 raise to the power of 3

So 2^3 is 8

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Check whether the function yequalsStartFraction cosine 2 x Over x EndFraction is a solution of x y prime plus yequalsnegative 2
Jobisdone [24]

The question is:

Check whether the function:

y = [cos(2x)]/x

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Answer:

To check if the function y = [cos(2x)]/x is a solution of the differential equation xy' + y = -2sin(2x), we need to substitute the value of y and the value of the derivative of y on the left hand side of the differential equation and see if we obtain the right hand side of the equation.

Let us do that.

y = [cos(2x)]/x

y' = (-1/x²) [cos(2x)] - (2/x) [sin(2x)]

Now,

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