Answer:
Rounded to the nearest ones: 30000
Rounded to the nearest tenths: 30000.5
Rounded to the nearest hundredths: 30000.49
Rounded to the nearest thousandths: 30000.490
Rounded to the nearest ten-thousandths: 30000.4898
 
        
             
        
        
        
Answer:
Solution: x = -2; y = 3 or (-2, 3) 
Step-by-step explanation:
<u>Equation 1:</u>  y = -5x - 7  
<u>Equation 2:</u> -4x - 3y = -1
Substitute the value of y in Equation 1 into the Equation 2:
-4x - 3(-5x - 7)  = -1
-4x +15x + 21 = -1
Combine like terms:
11x + 21 =  - 1
Subtract 21 from both sides:
11x + 21 - 21 =  - 1 - 21
11x = -22
Divide both sides by 11 to solve for x:
11x/11 = -22/11
x = -2
Now that we have the value for x, substitute x = 2 into Equation 2 to solve for y:
-4x - 3y = -1
-4(-2) - 3y = -1
8 - 3y = -1
Subtract 8 from both sides:
8 - 8 - 3y = -1 - 8
-3y = -9
Divide both sides by -3 to solve for y:
-3y/-3 = -9/-3
y = 3
Therefore, the solution to the given systems of linear equations is: 
x = -2; y = 3 or (-2, 3) 
Please mark my answers as the Brainliest if you find this helpful :)
 
        
             
        
        
        
So 20% is 1/5 as a percent.
So 1/5 multiplied by 5 equals 5/5, or 1.
So if 1/5 = 6, then 6 multiplied by 5, or 30, must equal 5/5, or 1.
So the total number of dolls in Amyia's doll collection is 30.
        
             
        
        
        
<h2>Answer</h2>

Or as ordered pairs: 
<h2>Explanation</h2>
Lets solve our system of equations  step by step
 equation (1)
 equation (1)
 equation (2)
 equation (2)
1. Solve for  in equation (2)
 in equation (2)

 equation (3)
 equation (3)
2. Replace equation (3) in equation (1) and solve for 




 or
 or  
 
3. Replace the values of  in equation (3) and solve for
 in equation (3) and solve for 
- For 


 or
 or 
- For 



 or
 or 
So, the solutions of our system of equation are:

 
        
        
        
Answer:
615.44 mm²
Step-by-step explanation:
Before finding the area of the circle, first, let us find the radius of the circle.
Given that, 
diameter ⇒ 28 mm
Therefore,
<h3>d = 2r</h3>
28 = 2r
Divide both sides by 2.
14mm = radius
<u>                                             </u>
And now, let us find the area.
The formula to find the area of the circle is :
<h3>Area = π r²</h3>
Let us solve now.
Area = π r²
         = 3.14 × 14 × 14
         = 43.96 × 14
         =<u> 615.44 mm²</u>