Please rewrite this equation of the circle correct with signs of minus or plus 
        
             
        
        
        
Answer:
 x + 6y = -3
Step-by-step explanation:
Explained in the paper.
 
        
             
        
        
        
The perimeter of the pentagon with apothem of 5cm is 28.87cm
<h3>How to calculate the perimeter of a pentagon</h3>
The sum of all the external sides of the pentagon is its perimeter.
First we need to calculate the half of one of its sides using the SOH CAH TOA
tan 30 = x/5
x = 5 tan 30
x = 2.89
One of the sides = 2(2.89) = 5.77 cm
Perimeter of th pentagon  = 5(5.77) = 28.87
Hence the perimeter of the pentagon with apothem of 5cm is 28.87cm
Learn more on perimeter of pentagon here: brainly.com/question/11484726
 
        
             
        
        
        
Answer: 
<h2>90°</h2>
Step-by-step explanation:
First you must calculate the module or the magnitude of both vectors
The module of u is:

The module of v is:

Now we calculate the scalar product between both vectors

Finally we know that the scalar product of two vectors is equal to:

Where  is the angle between the vectors u and v. Now we solve the equation for
 is the angle between the vectors u and v. Now we solve the equation for 

the answer is 90°
Whenever the scalar product of two vectors is equals to zero it means that the angle between them is 90 °
 
        
                    
             
        
        
        
Answer:

Step-by-step explanation:
Using the distributive property to expand, we have

Squaring each term, we have

The mistake was that  not
 not  Using the fact that
 Using the fact that  the right answer would be
 the right answer would be 
 .
.