Saying as there are 3 meals a day and there is 30 pounds of food and she feeds 1 pound a meal, the answer should be 30 meals
        
             
        
        
        
Answer:
138.3 
Step-by-step explanation:
 
        
             
        
        
        
It’s True.. you take the “extreme” variable from each proportion and cross multiply them before setting them equal to the product of the two “means” (which are just the other 2 numbers in the proportions).
        
             
        
        
        
Answer:
32
Step-by-step explanation:
So, lets go over what we know:
The equation to find x is the same on both sides.
Now, lets find this equation:
So, the total area of the two lines on the left side of the triangle are 24.
Lets first subtract the first line from the total of the two lines to find the value of the second line:
24-3
=
21.
Now that we know the value of the 2nd line is 21. lets divide it by the first line(3) to find the scale factor:
21/3
=
7 
So the scale factor is 7!
Lets plug this in for x. 
We know that the first line is 4.
The second line is 7x bigger than 4.
So we can calculate this as:
7x4
=
28
So x is 28!
This is your answer!
Hope it helps! :)