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tino4ka555 [31]
2 years ago
6

How do you solve -12 = 4b + 4

Mathematics
2 answers:
OLEGan [10]2 years ago
7 0

just watch my steps:

-12=4b+4

-12-4=4b

-16=4b

b=-4

hope i helped (:


goldfiish [28.3K]2 years ago
6 0

-12 = 4b+4

subtract 4 from each side

-16 = 4b

divide by 4

-4 =b

Answer b= -4

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the perimeter of a semicircle is 108 cm what is the perimeter of the square drawn on the diameter of the semicircle ​
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Answer:

Step-by-step explanation:

the perimeter of the semi-circle would be the diameter plus the circumference of half of the circle.  

They want to know the perimeter of a square using the diameter of the sem-circle as ONE side, so the perimeter of the square would be 4 times the ONE side.

We should recall:

diameter = 2 times the radius     circumference of a cirlce = 2π r

How do we find the diameter of the of the semi circle?

The perimeter of the semi circle is given as 108 cm

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                                  108   =   r ( 2 + π)           factor out the r and solve for r

                     108 / (2 + π)   =   r                       divide both sides by ( 2 + r)

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                                             =  864 / 5.14

                                             =   168.1 cm       I got rounded to nearest tenth    

<em>When I re-checked by work I found a few math,  logic and calculation errors.  Please re-check my answer for any more mistakes.</em>

       

4 0
3 years ago
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