Question

Which value is equivalent to x+4/4+x?

A. -4
B. -1
C. 1
D. 4

Answer 1

Answer:

Hello :

(x+4)/(4+x) = (x+4)/(x+4)  = 1   ( answer : C )  but x+4 no : 0

Answer 2

Answer:

C. 1

Step-by-step explanation:

Commutative property says that changing the order of the operands does not change the result. This can be expressed as:

$a+b=b+a$

Using the previous information, we can say:

$x+4=4+x$

And rewrite the equation as:

$\frac{x+4}{x+4}$

Since the numerator and denominator are the same:

$\frac{x+4}{x+4}=1\\\forall x\neq-4$