Answer:
 -0.8x + 4.8y + 16
Step-by-step explanation:
4(0.5x+2.5y-0.7x-1.3y+4) = 4( 0.5x - 0.7x  + 2.5y - 1.3y + 4) 
 = 4( -0.2x  + 1.2y + 4)
= 4*(-0.2x)  + 4 *1.2y + 4*4
= -0.8x + 4.8y + 16
 
        
                    
             
        
        
        
Answer:
A 3 and 8
Step-by-step explanation:
if a/b=c/d, the extremes are "a" and "d". The means would then be "b" and "c" 
 
        
             
        
        
        
Answer:
As shown in picture, this is a trapezoid.
The area of a trapezoid is calculated by:
A = (base1 + base2) x height x (1/2) 
To work out A, we need to find out base1, base2, and height.
base1  = YZ = 
base2 = XW =
Otherwise, the height (distance between base1 and base2) is 4 as shown in picture.
=> A = (3 + 7) x 4 x (1/2) = 20
Hope this helps!
:)
 
        
             
        
        
        
Answer:

Step-by-step explanation:
*Move terms to the left and set equal to zero:
4㏒(√x) - ㏒(3x) - ㏒(x²) = 0
*simplify each term:
㏒(x²) - ㏒(3x) - ㏒(x²) 
㏒(x²÷x²) -㏒(3x)
㏒(x²÷x² / 3x) 
*cancel common factor x²:
㏒( )
)
*rewrite to solve for x :
10⁰ = 
1 = 
1 · x =  · x
 · x 
1x = 
*that would be our answer, however, the convention is to exclude the "1" in front of variables so we are left with:
x = 
 
        
             
        
        
        
Answer:
9 4/7
Step-by-step explanation:
First, we need to make as many 7s as possible. If we do 67/7, we will get 9...... so our whole number is 9. If we do 7 x 9, we get 63 and if we subtract 63 from 67, we are left with 4. All in all, we will get 9 4/7!