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Mathematics 22 Online
OpenStudy (this):

helpppp pllzzzz

OpenStudy (this):

which of the following quadratic function has a maxim a, f(x)(x+9)^2-9 b,f(X)=3/7(x-7)^2+9 c,f(x)=7/3(x+8)^2+9

hero (hero):

Do you ever sleep?

OpenStudy (this):

lol yh i jst wake up nw hbu? men i trying to pass math class i ve really bad grd

hero (hero):

Are you interested in LEARNING mathematics?

OpenStudy (this):

im but some hw i dont get it

OpenStudy (this):

can u help me with my question?

hero (hero):

By the way, you say "I am", not "I'm"

hero (hero):

Don't you have a graphing calculator?

OpenStudy (this):

no

hero (hero):

Well, I highly recommend getting one

OpenStudy (this):

i will bt i dont know how to use it tho

hero (hero):

You can learn how to use it.

OpenStudy (this):

okay i will

hero (hero):

I graphed all three and they all have minimums

hero (hero):

So please double check what you have posted

OpenStudy (this):

a, f(x)=-(x+9)^2-9 b,f(X)=3/7(x-7)^2+9 a, f(x)(x+9)^2-9 b,f(X)=3/7(x-7)^2+9 c,f(x)=7/3(x+8)^2+9 d,f(x)=7/3(x+8)^2+9

hero (hero):

I think you mean that these are the answer choices: a, f(x)=-(x+9)^2-9 b,f(X)=3/7(x-7)^2+9 c,f(x)=7/3(x+8)^2+9 d,f(x)=7/3(x+8)^2+9 If so, the only option that will give a maximum is the one with a negative in front

OpenStudy (this):

yes, thanks

OpenStudy (this):

can u plz show me how u did it if u dont mind

hero (hero):

I graphed it on my graphing calc, however, even without graphing, I know that if the leading coefficient of a quadratic is negative, then it will produce a maximum vertex.

hero (hero):

So basically, even without graphing I would still be able to figure it out.

OpenStudy (this):

can u show me hw?

hero (hero):

I'll try: y = ax^2 + bx + c produces: |dw:1351763668056:dw| y = -(ax^2 + bx + c) produces: |dw:1351763745072:dw|

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