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ale4655 [162]
3 years ago
14

From the set 1,3,6 which of the values can be substituted for x to make the equation true 27-2x=15

Mathematics
1 answer:
Genrish500 [490]3 years ago
6 0

Answer:

6

Step-by-step explanation:

27 - 2x = 15

-2x = 15 - 27 = -12

2x = 12

x = 6

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suppose a farmer encloses a rectangular region of a land next to a river. fencing will be used on 3 sieds, and none is needed al
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Answer:

Dimensions :

x (the longer side, only one side with fence )   =  90  ft

y ( the shorter side two sides with fence )        =  45  ft

Total fence used   45 * 2  +  90    =  180 ft

A(max)  =  

Step-by-step explanation: If a farmer has 180 ft of fencing to encloses a rectangular area with fence in three sides and the river on one side, the farmer surely wants to have a maximum enclosed area.

Lets call "x" one the longer side  ( only one of the longer side of the rectangle will have fence, the other will be along the river and won´t need fence. "y" will be the shorter side

Then we have:

P = perimeter  =  180  =  2y  +  x        ⇒   y  =  ( 180 - x )  / 2        (1)

And   A (r)   =  x * y

A(x)   =  x  *  ( 180 - x ) /2       ⇒   A(x)   = (180/2) *x   -  x² / 2

Taking derivatives on both sides of the equation :

A´(x)   =  90   -  x    

Then if    A´(x)   =  0   ⇒        90   -  x    =  0     ⇒   x  =  90 ft

and from :       y  =  ( 180 - x )  / 2     ⇒     y  =  90/2

y  =  45  ft

And

A(max)  =  90 * 45    =  4050  ft²

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3 years ago
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Step-by-step explanation:

Please mark as brainliest if it helps. I need to rank up.

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Well first of this makes sense because you need to make sure your rug will fit.  So anyways, first lay your rug out on a flat surface, grab your yardstick, lay it on the rug to find the length and then the width.  you then know the size of your rug(assuming its square).  You can do the same thing in the room you want it in.  
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So,

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