The numbers which should be placed in the boxes from left to right, when Juanita factor the expression, is 6 and 3 respectively.
<h3>What is a factor of polynomial?</h3>
The factor of a polynomial is the terms in linear form, which are, when multiplied together, give the original polynomial equation as a result.
Juanita begins to factor an expression as shown. 

To find the value of blank, we have to factor the left-hand side expression using the split the middle term method as, 

Hence, the numbers which should be placed in the boxes from left to right, when Juanita factor the expression is 6 and 3 respectively.
Learn more about factor of polynomial here;
brainly.com/question/24380382
 
        
             
        
        
        
Step-by-step explanation:
the answer is in the above image
 
        
             
        
        
        
Answer:
AE = 18 units
Step-by-step explanation:
Δ AEB and Δ DEC are similar , then corresponding sides are in proportion, that is
 =
 =  , substitute values
 , substitute values
 =
 =  ( cross- multiply )
 ( cross- multiply )
10(2x + 4) = 12(x + 8) ← distribute parenthesis on both sides 
20x + 40 = 12x + 96 ( subtract 12x from both sides )
8x + 40 = 96 ( subtract 40 from both sides )
8x = 56 ( divide both sides by 8 )
x = 7
Then
AE = 2x + 4 = 2(7) + 4 = 14 + 4 = 18 units
 
        
             
        
        
        
Answer:
The which spends on the piano is( 50 minutes )
The which spends on the guitar is( 40 minutes )
Step-by-step explanation:
The steps of the solution in the above photo 
I hope that is useful for you :)