Name the property used in (5+2)+n=7+n A. Additive identity
B. Substitution property
C. Reflexive property
D. multiplication identity
HELP PLSS

Step-by-step explanation:

Additive identity is a property that involves the sum of two or more integers in an equation without compromising the equality of the equation.

Given the equation

(5+2)+n = 7+n

We can see that the right hand side of the equation is derived from the left hand had by addition of the values in parenthesis.

Given the right hand side;

= 5+2+n

= (5+2)+n

adding the expression in parenthesis will give;

= 7 + n

Since we added the expression in parenthesis to arrive at the expression at the right hand side, hence additive identity was used in the calculation.

(f - g)(x) = 5x^3 - 3

step-by-step explanation:

rearrange these functions vertically, with like terms in separate columns:

f(x) = 5x^3 - 2

g(x) =         +1

now subtract, column by column:

(f - g)(x) = 5x^3 - 3