The function f(x) = −x2 + 44x − 384 models the daily profit, in dollars, a shop makes for selling donut combos, where x is the number of combos 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) CAN YOU GVM THE ANSWERS PLEASE

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The function f(x) = −x2 + 44x − 384 models the daily profit, in dollars, a shop makes for selling donut combos, where x is the number of combos 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) CAN YOU GVM THE ANSWERS PLEASE

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@jim_thompson5910 ARE STILL THERE?
what do you have so far?

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The function f(x) = −x2 + 44x − 384 models the daily profit, in dollars, a shop makes for selling donut combos, where x is the number of combos 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)
you already posted that
yea can you help me its my last question?
|dw:1436488305187:dw|
|dw:1436488324499:dw|
|dw:1436488354162:dw|
oops I meant to say "a = -1"
Part A: -1? Part B: 44? Part C: -384?
no
THATS THE ANSWERS?
a,b,c that i listed are the coefficients not the answers
have you seen \[\Large y = ax^2 + bx + c\] before?
btw there is no part c
OH YEA MY Bad, so i need to solve that problem?
if a = -1 and b = 44 then what is \(\LARGE \frac{-b}{2a}\) equal to?
a=2 and b=2 ?
\[\Large \frac{-b}{2a} = \frac{-44}{2*(-1)} = ??\]
22?
yes, so x = 22 is where the vertex is plug x = 22 into the original equation to find y
so whats nexts? i need to find y?
yes
|dw:1436488910837:dw|
-342?
incorrect
you should have gotten -1*(22)^2+44(22) - 384 = 100
when x = 22, y = 100
|dw:1436489230679:dw|
oh ok, so whats next?
`What does this calculation mean in the context of the problem? ` what does the vertex tell us?
(22, 100)?
yeah what does it mean in the real world? how does it translate into english?
if you're stuck, what does x represent in this problem?
twenty-two
go back up at the top what does it say x represents? `where x is the...`
x = 22 ?
look at the instructions. It tells you what x means
I don't want the number
`The function f(x) = −x2 + 44x − 384 models the daily profit, in dollars, a shop makes for selling donut combos, where x is _________ and f(x) is _____________.`
vertex?
do you see what I mean? by asking to look at the instructions
Fill in the blanks `The function f(x) = −x2 + 44x − 384 models the daily profit, in dollars, a shop makes for selling donut combos, where x is _________ and f(x) is _____________.`
scroll to the very top of the page. You posted these instructions up there
where x is the "number of combos sold" and f(x) is the amount of profit
good
when we say x = 22 and y = 100 that means when 22 combos are sold, the profit is 100 dollars
oh
(22,100) is the vertex at the highest point, so the most profit we can get is $100 and that happens when 22 combos are sold
this is usually where managers want to aim
so that the answer for part A?
yeah all so far for A
OR THAT only one part?
we found the vertex and then gave an explanation of what it really means
ok thank you and for part B?
solve 0 = -x^2 + 44x - 384 for x you can use technology (graphing) or the quadratic formula
Part A:(22,100) is the vertex at the highest point, so the most profit we can get is $100 and that happens when 22 combos are sold Part B:?
part b) solve 0 = -x^2 + 44x - 384 for x you can use technology (graphing) or the quadratic formula
desmos is a good graphing calculator https://www.desmos.com/calculator
type in -x^2 + 44x - 384 then look for the x intercepts
TYPE IN THE CALCULATOR?
you see where the input box is?
NO :/
1 Attachment
OH OKAY WAIT LET ME SEE
1?
1 Attachment
OH IN THAT CALCULATOR I DONT KNOW HOW TO PUT X^2
do you see the points (12,0) and (32,0) ?
yes
you just put in x^2 like you typed
it understands that notation
(12,0) and (32,0) are the x-intercepts x-intercept (12,0) when x = 12, the value of y is 0 so when 12 combos are sold, the profit is $0 x-intercept (32,0) when x = 32, the value of y is 0 so when 32 combos are sold, the profit is $0
anything in between x = 12 and x = 32 means you'll have positive profits otherwise you will have 0 profit or negative profit (you lose money or owe it)
lose?
negative profit = you lost money ie you spent more than what you made
example you send $10 but you only make $6 so you lost $4 (6-10 = -4)
oh yea
so?
we're practically done with the problem
`Part B: Determine the x-intercepts. What do these values mean in the context of the problem?` the x-intercepts are 12 and 32. As ordered pairs they are (12,0) and (32,0). They represent the points where the profit is $0. This is where you break even. You don't gain any money and you don't lose any money.
so thats the asnwer for part B?
more or less
ANSWER*
LESS?
huh? I don't know what you mean? I'm basically saying "yes"
OH I THINK YOU ARE ASK ME IS MORE OR LESS
ignore that portion
SO WHAT WITH NEED TO DO NOW?
WE*
you're done, the problem is over
SO WAIT THE ANSWER FOR PART B ITS: MORE OR LESS?
no
I already gave it to you. Just go back and re-read it
the x-intercepts are 12 and 32. As ordered pairs they are (12,0) and (32,0). They represent the points where the profit is $0. This is where you break even. You don't gain any money and you don't lose any money.
???
yeah just put that into your own words. Hopefully you understand what I mean?
IN my own words? i dont know
you can do it
no please i can please i don't speak good english
:(
Give it your best shot. Just be confident.
so wait i need to write the answer in my own?
with my own letters?
yes
thankss for you help

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