# Math Help - SAT QOTD - Aug22

1. ## SAT QOTD - Aug22

Hello I'm having problem with this question. Please do not give me an infraction if it's in the wrong forum.

2. ## Re: SAT QOTD - Aug22

Here is a huge hint: $f(x)=-c(x-1)(x-4)~c>0.$

3. ## Re: SAT QOTD - Aug22

Originally Posted by Plato
Here is a huge hint: $f(x)=-c(x-1)(x-4)~c>0.$
I haven't taken Algebra 2 just yet, I'm really struggling here

4. ## Re: SAT QOTD - Aug22

Can we not just use the fact that a parabola is symmetrical? We are told that $f(x)\leq~u$ for all $x$...

5. ## Re: SAT QOTD - Aug22

Originally Posted by Quacky
Can we not just use the fact that a parabola is symmetrical? We are told that $f(x)\leq~u$ for all $x$...
Let me watch some tutorials and I will try my best!

6. ## Re: SAT QOTD - Aug22

It's a matter of symmetry. The parabola is symmetric about its axis which, here, is a vertical line passing through the vertex. So what is the x coordinate of the vertex?

7. ## Re: SAT QOTD - Aug22

Originally Posted by HallsofIvy
It's a matter of symmetry. The parabola is symmetric about its axis which, here, is a vertical line passing through the vertex. So what is the x coordinate of the vertex?
Originally Posted by Quacky
Can we not just use the fact that a parabola is symmetrical? We are told that $f(x)\leq~u$ for all $x$...
Originally Posted by Plato
Here is a huge hint: $f(x)=-c(x-1)(x-4)~c>0.$
I think is 2

8. ## Re: SAT QOTD - Aug22

Originally Posted by vaironxxrd
I think is 2
No! What is the midpoint between $(1,0)~\&~(4,0)$ the intercepts?
Can you average 1 & 4?

9. ## Re: SAT QOTD - Aug22

Originally Posted by Plato
No! What is the midpoint between $(1,0)~\&~(4,0)$ the intercepts?
Can you average 1 & 4?
I really should feel stupid, 3?

10. ## Re: SAT QOTD - Aug22

Originally Posted by vaironxxrd
I really should feel stupid, 3?
The midpoint is $(2.5,0)$.
There is only one in that list that will work.
What is it?

11. ## Re: SAT QOTD - Aug22

Originally Posted by Plato
The midpoint is $(2.5,0)$.
There is only one in that list that will work.
What is it?
(2.5 ,3)

Really I still don't understand what's going on

12. ## Re: SAT QOTD - Aug22

Originally Posted by vaironxxrd
(2.5 ,3)
Really I still don't understand what's going on
If you have not had the full range of basic secondary mathematics, why would you expect to understand SAT mathematics questions? After all, the SAT measures readiness for college level work.

13. ## Re: SAT QOTD - Aug22

Originally Posted by Plato
If you have not had the full range of basic secondary mathematics, why would you expect to understand SAT mathematics questions? After all, the SAT measures readiness for college level work.
Yeah I do understand I must improve those fields. But I really need some guidelines/helps/tips , I set you a message asking about that.

14. ## Re: SAT QOTD - Aug22

Originally Posted by vaironxxrd
Yeah I do understand I must improve those fields. But I really need some guidelines/helps/tips , I set you a message asking about that.
Please understand that this is not a tutorial service. We simply cannot provide instructional services. There are sites on the web that are setup to do just that, for a fee. This is a free help service. That means we help you with what you have already done in lectures but may not fully grasp. We do not provide instruction on new material.