Question

help!! ill give a medal and fan you!!

Answer 1

Happy Birthday! Or maybe Happy Un–Birthday? Either way, here is a fun birthday trick.

Take the month you were born in. Multiply it by 4, add 13, multiply by 25, subtract 200, add the day you were born, multiply by 2, subtract 40, multiply by 50, add the last two digits of your birth year, subtract 10500…. viola! Your birth date! Impress your friends!

Now, use your birthday for some more math fun.

You can locate graph paper here.

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.

Create two additional quadratic functions, g(x) and h(x).
The function g(x) will open the same direction as f(x), have the same vertex, but will be narrower.
The function h(x) will open in the opposite direction as f(x), have the same vertex, but will be wider than f(x).
Write your functions below and explain in complete sentences why those functions will meet the requirements in the question.

Graph your functions. 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.

Explain the appropriate translations of your graphs, if you were born two months earlier and 5 days later. Use complete sentences.

Answer 2

@rocker128 can u help?

Answer 3

i would but i dont know how to do it.
ps that bday works. i tried it on mine nd i got it :)
sorry

Answer 4

i see you're taking algebra 2 as well

Answer 5

i did this one though, let me upload it

Answer 6

which lesson was this again?

Answer 7

well when you find the lesson, just tell me and ill help, i

Answer 8

unit 3 lesson 5 @trueseminole

Answer 9

oh.. i skipped that one, and i don't know why I did

Answer 10

can you still help? @trueseminole

Answer 11

ill try

Answer 12

tomorrow though

Answer 13

@trueseminole

Answer 14

First, can you do this part

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.

?

Answer 15

well my birth day is 4(28) im not sure if thats right how i wrote it

Answer 16

they want you to know what
quadratic function, f(x), in vertex form.
means

it means the equation looks like this:
\[ f(x) = a(x-h)^2 + k \]
they want you to replace the letters "a", "h", and "k" with numbers (based on your birthday)
except for "a".
The a should be between 4 and –4,

Answer 17

f(x)=a(x-4)^2+28 @phi

Answer 18

so far so good. but you need to pick a number for a

Answer 19

how about 2? @phi

Answer 20

the question says, pick any number you want between -4 and +4.
2 is OK

\[ f(x)=2(x-4)^2+28\]

Answer 21

that was supposed to be easy (as long as you know what vertex form means)

now to the question:

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

standard form is
y = a x^2 + b x + c
where a, b and c are numbers

Answer 22

y=2x^2+4x+28 @phi

Answer 23

how did you do that ? the question asks you to explain how.

Answer 24

i put my numbers in were the letters where @phi

Answer 25

to convert
\[ f(x)=2(x-4)^2+28 \]
to standard form, you have to expand (x-4)^2
in other words, the first step is multiply out (x-4)(x-4)
can you do that ?

Answer 26

it would be 0 @phi

Answer 27

no. See
http://www.khanacademy.org/math/algebra/multiplying-factoring-expression/multiplying-binomials/v/multiplying-binomials

for how to do
(x-4)(x-4)

Answer 28

8 for both @phi

Answer 29

I am confused. (x-4) * (x-4) is not a simple number

Answer 30

im so confused can u show me? @phi

Answer 31

Khan explains it better that I can
http://www.khanacademy.org/math/algebra/multiplying-factoring-expression/multiplying-binomials/v/multiplying-binomials

Answer 32

yea so they would both be 8 @phi

Answer 33

did you watch the video ?

Answer 34

yea of course @phi

Answer 35

according to the video
what does F mean in
(x+4)(x+4)

Answer 36

it means first @phi

Answer 37

Yes, and first means the first of (x+4)(x+4)
it means x and x. you multiply x*x and get x^2
now O (outer)
means x and 4
Inner 4 and x
Last 4 and 4

Answer 38

would x and 4 be x^4? @phi

Answer 39

you are multiplying
x times 4
you can write that as 4x

Answer 40

(x^2+x4)(4x+8) @phi

Answer 41

no.

Answer 42

darn! what did i do wrong? @phi

Answer 43

i dont think u did any thing wrong i think dats right

Answer 44

@969034 i only need help with these parts now can you help?
Create two additional quadratic functions, g(x) and h(x).
The function g(x) will open the same direction as f(x), have the same vertex, but will be narrower.
The function h(x) will open in the opposite direction as f(x), have the same vertex, but will be wider than f(x).
Write your functions below and explain in complete sentences why those functions will meet the requirements in the question.

Graph your functions. 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.

Explain the appropriate translations of your graphs, if you were born two months earlier and 5 days later. Use complete sentences

Answer 45

OK

Answer 46

@969034 so no help??

Answer 47

The information included in this question is the intellectual property of Florida Virtual School. Posting questions from any FLVS course and receiving answers is considered cheating.

Answer 48

stfu ^