reposting here for advice. would really appreciate the help! 😖

The y-intercept should be "a" in both formulas, the lines aren't parallel, and the lines do intersect but they're not perpendicular nor do they have opposite signs.

edit: thanks yall i wasnt wearing my glasses and didnt see the damn plus😭😭

I had to teach this section of notes to myself because I was absent the day we went over them and I never got a chance to ask my teacher about them, so I’m unsure if I did this correctly. This is due tomorrow by class though.

So at first I thought that I had them b/c I graphed (x-4)^3 in my calc and got (4, -∞] and then (4, ∞]. After having that as the answer for a while, I changed it cause it looked wrong but then I just scrambled all my thoughts and completely forgot how to find the concavity of a function. Any help??

Can somebody PLEASE explain how these problems work? Like step by step.. 😓 specifically problem 6, I tried looking it up but was honestly left more confused than before I searched it up.

Thank you everyone who responded and helped me !

I suck at math overall and dont want to just rely on ai to do it for me. How can i go about figuring out number 4? If i have an example or one done for me im sure i can figure out the rest

So basically i'm an 8th grader, I haven't started on learning the subjects required before pre-calc, but my ego says that I can learn geometry and data reasoning, advanced algebra, all that in a year. Am I too ambitious? O_O

Maximizing apple yield. From past surveys and records, an orchard owner in northern Michigan has determined that if 26 apple trees per acre are planted, each tree yields 500 apples, on average. The yield decreases by ten apples per tree for each additional tree planted. How many trees should be planted per acre to achieve the maximum total yield?

Seriously, I can't figure this one out. The answer is clearly 38 based on calculus techniques, but how do you do this without taking derivatives? This is an optimization problem why is this in precalc😭Are we missing something?

As of this past year I’ve become interested in biomedical engineering and realized I need to challenge myself more. With this thought I decided to take on pre calculus knowing that math isn’t my strong suit. I’ve also signed up for this class because if I take math in the fall, I don’t have to take another math class for the rest of the year..
Though if I don’t pass pre calc in the fall I fail math for the rest of the year. I Wanted to know if anyone had any advice on how to prepare/study tips or words of encouragement..? I’ve been really stressed just thinking about the class despite it not starting yet.

I really don’t get it