Answer:7 
Step-by-step explanation:it’s 7
 
        
             
        
        
        
3xy-5x+9y-45
Step-by-step explanation:
Step by Step Solution
STEP1:STEP2:Pulling out like terms
 2.1     Pull out like factors :
   3y - 15  =   3 • (y - 5) 
Equation at the end of step2: (x • (3y - 5)) + 9 • (y - 5) STEP3:Equation at the end of step 3 x • (3y - 5) + 9 • (y - 5) STEP4:Trying to factor a multi variable polynomial
 4.1       Split       3xy-5x+9y-45 
 4.1       Split       3xy-5x+9y-45 
             into two 2-term polynomials
             -5x+3xy   and    +9y-45
             This partition did not result in a factorization. We'll try another one:
             3xy-5x   and    +9y-45
             This partition did not result in a factorization. We'll try another one:
             3xy+9y   and    -5x-45
             This partition did not result in a factorization. We'll try another one:
             3xy-45   and    +9y-5x
             This partition did not result in a factorization. We'll try another one:
             -45+3xy   and    +9y-5x
             This partition did not result in a factorization. We'll try 
 
        
             
        
        
        
Answer:   
<u>Step-by-step explanation:</u>
 (4, 1) & (2, -5) 
First, find the slope (m) and then the perpendicular (opposite reciprocal) slope:

Next, find the midpoint of (4, 1) and (2, -5):

Lastly, input the perpendicular slope and the midpoint into the Point-Slope formula to find the equation of the line:

 
        
             
        
        
        
Answer: 4500 grams
Step-by-step explanation: 1 kilogram is 1,000 grams, so 4 kilograms is 4,000 grams, and half a kilogram is 500 grams. So, 4000 + 500 = 4,500