<span>Simplifying
7p + 2 = 5p + 8
Reorder the terms:
2 + 7p = 5p + 8
Reorder the terms:
2 + 7p = 8 + 5p
Solving
2 + 7p = 8 + 5p
Solving for variable 'p'.
Move all terms containing p to the left, all other terms to the right.
Add '-5p' to each side of the equation.
2 + 7p + -5p = 8 + 5p + -5p</span>
        
                    
             
        
        
        
The expression for 7(2+9) IS A(B+C) which is distributive property of addition over multiplication.
Only two arithmetic procedures are subject to the commutative property: Multiplication and Addition
  A + B = B + A Which is Commutative property of addition
 A.B = B.A, which is a commutative property of multiplication.
Distributive property is A(B+C) =AB+AC
 The operation on numbers that are available in brackets can be distributed for each number outside the bracket, according to the distributive property. It is one of the mathematical properties that is used the most. Commutative and associative qualities are the other two important features.
from the given data 7(2+9) =7*2+7*9
                                                 =14+63
                                                 =77
 Now, we can clear that 7(2+9) =7(9+2) 
Hence, the expression for commutative property of addition is A(B+C) = AB+AC.
To learn more about commutative property, visit 
brainly.com/question/28387735
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Answer:
2√21
Step-by-step explanation:
1) Simplify.
√84
2) Simplify √84 to 2√21.
2√21
 
        
             
        
        
        
Answer:
y = - 
 x + 3
Step-by-step explanation:
Assuming you require the equation of the line
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
Here m = - 
 , thus
y = - 
 x + c ← is the partial equation
To find c substitute (- 4, 6) into the partial equation
6 = 3 + c ⇒ c = 6 - 3 = 3
y = - 
 x + 3 ← equation of line