Answer:
4 seconds 
Step-by-step explanation:
Given : 
To Find: How many seconds does it take for the golf ball to hit the ground?
Solution :
Since we are given an equation : 
Where H denotes height 
t denotes the number of seconds elapsed since the ball was hit. 
When he golf ball to hit the ground at that time the height becomes 0 
So, put H = 0 in the equation






Thus it take 4 seconds for the golf ball to hit the ground
 
        
             
        
        
        
First, let's put all of the variables together. 
4m + 5m + 5 + 40 = 180. 
Add them. 
M is the same multiplier, so we can add 4 and 5 together to make 9m. 
Add 5 and 40. 
9m + 45 = 180. 
From here, we can go two ways. I will show the first way, which is my personal  preference. 
We want to get rid of the coefficient on m to isolate it, so we must divide it by its coefficient. The coefficient on m is 9. So, divide m by 9. We must also divide everything else by 9.
 9m/9 = 1m
45/9 = 5
180/9 = 20
Plug it in--
m + 5 = 20. 
Subtract the 5 from both sides to isolate m. 
m = 15. 
 
        
                    
             
        
        
        
Answer:
9/-5
Step-by-step explanation:
5--4/-2-3
9/-5
 
        
                    
             
        
        
        
Answer:
0.7 and 0.8
Step-by-step explanation:
First you have to use your multiplication table, find out how much equals to 0.56 to make it easer just remove the zero and decimal point for example: 0.56 - 56 then divide it using all numbers. i divided it by 0.8 and is there that number yes and then i got 0.7 and that number is there too.