Answer:
x≥7
Step-by-step explanation:
6(x-3)/8≥3
Multiply each side by 8/6
8/6*6(x-3)/8≥3*8/6
(x-3)≥4
Add 3 to each side
x-3+3≥4+3
x≥7
 
        
             
        
        
        
The answer for number 4 is 13 and number 6 is 121 and the last problem for number 7 is 112
        
             
        
        
        
Answer:
Step-by-step explanation:
Let 
y=2x-10
Switch x and y,
x=2y-10
x+10=2y
(x/2)+5=y
So 
 
        
             
        
        
        
Answer:
$8.50
Step-by-step explanation:
$8.50 x 18% = $1.53