Assuming the coin is fair, probability of getting one tail is 50%, probability of getting two tails in a row is 50%*50% = 25% or 1/4
        
                    
             
        
        
        
Answer:
1xgr7`0ryu932
Step-by-step explanation:
 
        
             
        
        
        
Answer:
1  :
Step  2  :
Equations which are never true :
 2.1      Solve :    2   =  0
This equation has no solution.
A a non-zero constant never equals zero.
Solving a Single Variable Equation :
 2.2      Solve  :    2x+1 = 0 
 Subtract  1  from both sides of the equation : 
                      2x = -1
Divide both sides of the equation by 2:
                     x = -1/2 = -0.500
One solution was found :
                   x = -1/2 = -0.500
 
        
             
        
        
        
An equation that correctly represent this relationship if x represents the number of pounds of fertilizer and y the number of ounces of weed killer is  0.5x + 3.5y = 70
<u>Solution:</u>
Given that, Bill spent 70 on fertilizer and weed killer for his lawn 
Each pound of fertilizer cost 50 cents and each once of weed killer cost 3.50
We have to write an equation, if x represents the number of pounds of fertilizer and y the number of ounces of weed killer.
Now,<em> total amount = amount for fertilizers + amount for weed killers.</em>
Total amount = number of pounds of fertilizers x cost per pound + number of ounces of weed killer x cost per ounce.

Hence, the equation is 0.5x + 3.5y = 70