Confusion on Practice Sheet

Question

5x+y²=25 (Not a linear equation because any exponent higher than one is "an issue) 8+y=4x (is a linear equation but I don't know how to put it in standard form, please help?) 9xy-6x=7 (not a linear equation because it has both X and y multiplied together) 4y²+9=-4 (exponent higher than one so not a linear equation) 12x=7y-10y (12x=-3y? Not a linear equation?) y=4x+x (y=5x? Not a linear equation?) I don't understand most of this.

Answer 1

Hello. What you said about each equation is EXACTLY right EXCEPT the last two.

12x = 7y - 10y equals 12x = -3y

y= 4x + x equals y = 5x

You simplified those correctly! :) The only mistake- they ARE BOTH linear because exponents are 1 and x & y weren't multiplied together. (You stated those facts correctly- good job!)

My question: DID the problem want you to rearrange into standard form. If so let me know and I will help with that.

I SURE HOPE THAT HELPED!

Answer 2

Below is the Standard Form of a Linear equation in two variables

Ax + By = C

You want the variables on one side of the equal sign and the constants on the other for example.

8 + y = 4x

In standard form

4x - y = 8

Give it a try

To check your lines you can also grap them

I hope you find this useful if you have any questions send me a message.