Question

Can anyone help me with algebra 2 please???? Im begging you?!?!?!?

Answer 1

this is the question im so lost

Answer 2

Create a quadratic function, f(x), in vertex form. The a should be between 4 and –4, the h will be your birth month, and the k will be your birth day. Write your equation below.

Using complete sentences, explain how to convert your birthday function into standard form.

Graph your function. Include your graph below.

Using complete sentences, explain how to find the average rate of change for f(x) from x = 4 to x = 7.

My birthday 12/04/1998

Answer 3

f(x)=3(x-8)2+15

Answer 4

is that for the first question??

Answer 5

yes

Answer 6

A. g(x)=2(x+-8)2+15. This meets the requirements because it opens in the same direction as function f(x) because a is positive which means it opens upward. It has the same vertex, 10, 1 because the h and k are the same as the function f(x), and it will be narrower since a is 2 which is less than the 3 used in the function f(x).
B. h(x)=-2(x-8)2+15. This meets the requirements because it will open in the opposite direction, downwards, since a is negative. It has the same vertex, 10, 1 because the h and k are the same as the function f(x), and it will be wider because -2 is less than 3 and the smaller the number, the wider the parabola.

Answer 7

Google how to change an equation from vertex to standard form for #2

Answer 8

but doesnt it have to go by my birthday

Answer 9

Yeah I'll give you a link that should help you :)

Answer 10

http://openstudy.com/study#/updates/52570bd1e4b0ede9e447371c

Answer 11

http://openstudy.com/study#/updates/525f35bee4b002bdb0922f2d

Answer 12

yeah i looked at that but i have a diff bday so its not helpful

Answer 13

do you actually have to use your birthday? does your teacher know your exact birthday? i'm sure she/he won't mind because your teacher just wants to make sure you now how to do it :)

Answer 14

also, they show the steps and everything. just plug in your birthday if you want. :)

Answer 15

yeah but im taking it on an online thing and itll know if i use someone else work. Plus i want to understand how to do it

Answer 16

what online thing? :)

Answer 17

flvs

Answer 18

hmm ok well i can't really explain how to do it so you'll understand, but the link i gave you did a pretty good job. just look at what they said and try to understand. :)

Answer 19

thx anyways though

Answer 20

sure :)

Answer 21

I'm not sure I understand what it's asking! D:

Answer 22

lol um 1 sec

Answer 23

Kay

Answer 24

Create a quadratic function, f(x), in vertex form. The a should be between 4 and –4, the h will be your birth month, and the k will be your birth day. Write your equation below.

My Bday is 12/04/1998

Answer 25

an equation like f(x)=3(x-8)2+15 but made with my bday

Answer 26

Well
General quadratic formula ...
y = a(x-h)² + k

f(x)=2(x-12)^2+4
g(x)=3(x-12)^2+4
h(x)=-1(x-12)^2+4

Answer 27

ok so it would be f(x)=2(x-12)^2+4 for the first question??

Answer 28

Yep :)

Answer 29

omg ty ok so the next part is

Answer 30

Using complete sentences, explain how to convert your birthday function into standard form.

Answer 31

Hold on let me work on this >.<

So standard form is;

Standard Form is ...

Ax^2 + By = C
use F.O.I.L on (x - 12)^2 and combine it with +15.

Answer 32

were is the 15 from??

Answer 33

/).< I was talking to someone else when I wrote that lol >.< I mean 4

Answer 34

oh lol ok so im foiling (x-12)^2 by 4??

Answer 35

so it would be 4x-48)^2

Answer 36

Nono, (x - 12)(x - 12) + 4

Answer 37

ohhhhh

Answer 38

so it would be x^2-12x-12x-144+4

x^2-24x-140??

Answer 39

Yep, that is your standard form equation

Answer 40

ok so how would i explain that in sentences??

Answer 41

hm... explain exactly what I showed you, and how you worked to get it.

Answer 42

So??

Foil x minus twelve squared plus four to get x squared minus twelve x minus twelve x minus onehundred and forty four plus four. Then Simplify to x squared minus twenty four x minus one hundred and forty which is standard form>

Answer 43

/).< Oh boy

Answer 44

lol is that correct

Answer 45

Not quite.. explain the steps, not the equations, but do include the outcome

Answer 46

So more like multiply x by x ,x by 12, 12 by x, 12 by 12, which gives you x squared minus twelve x minus twelve x minus onehundred and forty four plus four. Then simplify by adding the 12 x's and subtract 4 from the 140 which gives you x squared minus twenty four x minus one hundred and forty which is standard form.

Answer 47

Yep :)

Answer 48

yes ty lol heres the next part

Answer 49

Using complete sentences, explain how to find the average rate of change for f(x) from x = 4 to x = 7.

Answer 50

Average rate of change is \[\frac{ f(b)-f(a) }{ b-a }\]

Answer 51

ok so what would be b and what would be a??

Answer 52

The equation to use is f(x) = 2(x -12)^2 + 4

Answer 53

idk im still confused

Answer 54

i cant figure out whats a and b

Answer 55

And in this case, I'd actually do this;
\[\frac{ y _{2} - y _{1} }{ x _{2} - x _{1} }\]

\[y _{2} = 2(7 - 12)^{2} + 4\]
\[y _{1} = 2(4 -12)^{2} + 4\]

Answer 56

??where is the 7 from??

Answer 57

x(1) = 4
x(2) = 7

Answer 58

ohhhhhhh

Answer 59

Sorry, should have elaborated a bit more

Answer 60

ok but what about f(b)−f(a/)b−a

Answer 61

and its ok youre so helpful

Answer 62

Scratch that out! Go with the second one I showed you >.<

Answer 63

ok

Answer 64

so how would i subtract them

Answer 65

So you have to solve the equations, before you're able to do
\[\frac{ y _{2} - y _{1} }{ x _{2} -x _{1} }\]

Answer 66

yeah how do i subtract y2=2(7−12)2+4

y1=2(4−12)2+4

Answer 67

Solve the equations first

Answer 68

wait which one??

Answer 69

both of them xD

Answer 70

im simplifying y2 and y1 then subtracting them right

Answer 71

Yes!
Simplify the equations (there are no variables no so it'll be easy to come up with a straight-forward answer)

Answer 72

so subtracted it would be 12

Answer 73

Okay, then what is 7-4?

Answer 74

3

Answer 75

so then the final answer is 4??

Answer 76

12/3

Answer 77

Yep :D

Answer 78

omg yes youre perfect lol now how do i explain that in sentences

Answer 79

How did I help you find the answer? What steps did we take to get the answer?

Answer 80

lol a lot of them

Answer 81

Explain the steps >.<

Answer 82

Hmm,

Well to be honest, you can use \(\ \dfrac{f(b) - f(a)}{b - a} \) it's just a bit more tedious than change in y over change in x

Answer 83

thx fiz lol

Answer 84

Shhh Fizi I know we caaan but I like doing it the other way dweeb

Answer 85

;-; Bu-but D;

Answer 86

so you subtract y2 from y1 whixh is y2=2(7−12)2+4

y1=2(4−12)2+4 to get -16-(-28)=12 then subtract 7-4=3 then divide the 12/3=4 which is the answer

Answer 87

Sure, that's a very simple way to put all of those steps.. xD

Answer 88

yeah lol

Answer 89

i also have to graph it know where i can do that??

Answer 90

ohh shiz I don't know.. um.. @tHe_FiZiCx99

Answer 91

How to graph vertex form? Pretty simple :3 I'm still reading the whole problem

Answer 92

actually i have to graph the answer to number 2

Answer 93

I'm not good with graphing things. it takes me like an hour to graph something -_-

Answer 94

lol thats ok

Answer 95

Ohhh wait, it says to graph your function in step 3 . . . I think, graphing standard form is actually easier than vertex form

Answer 96

lol yeah i have to graph x^2-24x-140

Answer 97

just use an online graphing calculator xD

Answer 98

lol i used wolphram alpha