## anonymous one year ago Help plz fan and medal

1. anonymous

The function f(x) = −x2 + 50x − 264 models the profit, in dollars, a yoga studio makes for selling monthly memberships, where x is the number of memberships sold and f(x) is the amount of profit. Part A: Determine the vertex. What does this calculation mean in the context of the problem? (5 points) Part B: Determine the x-intercepts. What do these values mean in the context of the problem? (5 points)

2. anonymous

I only need help on Part B

3. anonymous

@welshfella

4. anonymous

@phi

5. anonymous

really :/ no one :/

6. anonymous

Sorry, I forgot how to do this. I'd help you if I could.

7. anonymous

Oh ok thanks man ._.

8. anonymous

Alright dude :P

9. phi

$f(x) = −x^2 + 50x − 264$ this is a parabola with the shape of $$\cap$$, so it has a peak (called the vertex) the x value of the vertex is found using $x= \frac{-b}{2a}$ where a and b are defined by matching your parabola with $y=a x^2 + bx + c$

10. anonymous

@DarkMoonZ Sorry, I forgot that this was a quadratic function. Ugh. I did know how to do this. Sorry, cuz i saw x2 i assumed it wasn't

11. anonymous

Oh ok then lol

12. triciaal

Part B in the context of the problem x-intercepts means when y = 0 the subscriptions sold when no profit is made