Answer:
Dave needs to mow 14 lawns to have enough money to buy a bike.
Step-by-step explanation:
180-40=140, 140/10=14. Dave needs to mow 14 lawns to have enough to buy a bike.
 
        
             
        
        
        
Answer:

Step-by-step explanation:
Hello There!
Once again we need to isolate the variable using inverse operations
to get rid of the -8.2 we add 8.2 to each side
-8.2+8.2 cancels out 
-9.7+8.2=-1.5
now we have
-1.2z>-1.5
now we wan to get rid of the -1.2 
to do so we want to divide each side by -1.2

Remember we have to flip the inequality sign because we're dividing by a negative number
we're left with 
z<1.25