Make each known side into a ratio like so...
75/6 
(Because 75 is the shadow casted by the building, and 6 is the shadow casted by sarah)
and 50/x 
(50 is how tall the building is and sarah's height is what needs to be found) 
Therefore, 
75    50
----  -----
 6      x
Do cross products;
50 x 6 = 75 x X
300 = 75x 
Divide by 75 
x = 4ft
        
             
        
        
        
Answer:
I think you have not written the full question
 
        
             
        
        
        
Answer:
Increase of 8
Step-by-step explanation:
x = y-8
y=x+8
 
        
             
        
        
        
Answer:
C and E
Step-by-step explanation:
Examples of binomials (two terms) :
9a - 5
3x + 6y
-4t + 2
Examples of monomials (one term) :
6x
10z
4a
Examples of trinomials (three terms) :
7y - 3x + 4
8x + 7 - 2a
4x + 9y + 5
(There can also be exponents and fractions in any kind: binomial, monomial, or trinomial.)