Answer:

Step-by-step explanation:
Add the amounts together:

Convert the whole number 1 into a fraction with denominator 4:

As all the denominators are the same, we can simply add the numerators:


Finally, convert the improper fraction into a mixed number:

 
        
                    
             
        
        
        
<h2>
The stone fall in air for 7 seconds and fall in water for 5 seconds.</h2>
Step-by-step explanation:
Total distance to sea bed = 127 m
Let the distance traveled in air be s.
Distance traveled in water = 127 - s
Average velocity in air = 16 m/s
Average velocity in water = 3 m/s
Distance traveled in air = Average velocity in air x Time in air
s = 16 x t₁

Distance traveled in water = Average velocity in water x Time in water
127-s = 3 x t₂

We have total time is 12 seconds
That is 
                 t₁ + t₂ = 12
                 
We have
             s = 16 x t₁
             112 = 16 x t₁
              t₁ = 7 s
            t₁ + t₂ = 12
             7 + t₂ = 12    
              t₂ = 5 s
The stone fall in air for 7 seconds and fall in water for 5 seconds. 
 
        
        
        
Answer:

Step-by-step explanation:
Given
a(-5,4) and b(7,-4)
Required
Partition P
Given that the segment ab is divided into ratio;
The coordinates of point p can be calculated using ratio formula given below

Where m and n are the ratio; m = 1 and n = 4

So,
 becomes
 becomes




Hence, the coordinates of p are (-2.6,2.4)
 
        
             
        
        
        
Nor sure what you're doing on the bottom but use point slope thing
y-0=-2(x+2)
y=-2x+2
So not sure what you're asking but...
yeah, you're right.