Identify the like terms of 3x, choose all that apply:

3y
5x
3xy
-2x
3
7y
x

5x, -2x and x.

Step-by-step explanation:

Like terms are those that contain the same variables and with the same exponents, regardless of the coefficient or the sign they may have.

In this case we have the term 3x, the variable is x, so like terms must be those that contain x.

let's analyze the options:

3y: here we don't have the variable x but inted we have y, thus this is not a like term of 3x, also the fact that they the same coefficient its not relevant to identify like terms.5x: Here we find that we have the same variable and the same exponent that in 3x (which is the x), so this is a like term3xy: We have the x but we also have a y that is not part of the original term 3x, which make this not be a like term.-2x: for the same reasons as in 5x, this is a like term, because we have the x, and we don't care about the sign or coefficient  being different.3: We don't even have the variable x, so it's not a like term7y: for the same reasons as in 3y, this is not a like termx: this is a like term because we have what we are looking for is a like term: the x.

In summary, like terms of 3x are: 5x, -2x and x.

the answer would be c ≈ 18.852*3.14= 6.286.28*3=18.85