I need this ASAP MY TEACHER KEEPS CONTACTING ME PLZ HELP Combine like terms: 9x+8y-4x-2y9x+8y−4x−2y

If the expression is 2y+9x the answer is: 10x+12y

If the expression is 2y-9x the answer is -8x+12y

Step-by-step explanation:

You would combine all your x values:-4,9,9,-4 and that equals 10 then you would add your variable, so your x value is 10x.

You would then combine all your y values: 8,-2,8,-2, and that equals 12, then you would add your variable, so your y value is 12y.

x+14y-18xy

Step-by-step explanation:

1) Multiply terms if needed.

2) Group your terms by variables. (x with x, y with y, xy with xy, etc.)

3) Add like terms (terms with same variables)

This problem will look like:

Step one: take the term "-2y9x" and multiply to creat one term (You have to remember PEMDAS with these problems. Look it up if you don't know what it is :) ) You should come up with -18yx for this term.

Step two:  Organizing terms --->   9x-4x-4x+8y+8y-2y-18xy

Step three: Take your like terms and add them together. Your answer should end up being x+14y-18xy

so then what are you asking?

step-by-step explanation:

step-by-step explanation: