I need help with 9 questions, can someone do all 9 for me I need them to raise my grade up, I will give all my points and brainliest, send insta or something so I can send all questions, it’s algebra 2

Segment xz is bisected by point y. if xy = 12x, and the measure of xz = 18x – 6, solve for x

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.

Plot the intercepts to graph the equation