Which shows the use of the commutative property? 3 (7 + n) = 21 + 3 n 7 + (3 + n) = (7 + 3) + n 3 n + 7 = 7 + 3 n (7 + 3) + n = 10 + n

4.6875 pounds

step-by-step explanation:

i believe that the answer is

b. y-1=-2(x-4)

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answer: bea's uncle is 25 years old.

step-by-step explanation:

given the equation , we can say that the variable "x" represents the age of bea's uncle. then to find his age, we need to solve for "x":

we must add 15 to both sides of the equation:

now we need to divide both sides of the equation by 3:

therefore, we can conclude that bea's uncle is 25 years old.

df =

both have same length