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Mathematics 10 Online
OpenStudy (anonymous):

Given f(x) = the quantity of 5x plus 1, divided by 2, solve for f-1(8) PLZ HELP

OpenStudy (anonymous):

@$oumya

OpenStudy ($oumya):

is it f^-1(8)??

OpenStudy (anonymous):

yeah

OpenStudy (anonymous):

??

OpenStudy (anonymous):

@sochittasal

OpenStudy (anonymous):

@xapproachesinfinity

OpenStudy (anonymous):

\[5x+1/\]

OpenStudy (anonymous):

5x+1/2

OpenStudy (anonymous):

f^-1(8)

OpenStudy (xapproachesinfinity):

oh you want f inverse if im not wrong?

OpenStudy (anonymous):

i guess i dont know how to do it

OpenStudy (anonymous):

i think you find the inverse then solve for x

OpenStudy (anonymous):

well 8

OpenStudy (xapproachesinfinity):

ok, give a minute to find the f inverse and evaluate it at 8

OpenStudy ($oumya):

i think it will 3

OpenStudy (anonymous):

how do you know that

OpenStudy (xapproachesinfinity):

the answer is 15/8

OpenStudy (anonymous):

my options are 3 7 10 20

OpenStudy ($oumya):

y=f(x)=(5x+1)/2 in the case of f^-1(x) there x and interchanges we know y= (5x+1)/2 x=(5y+1)/2 f^-1(x)=(2x-1)/5 for f^-1(8) it will be {2*8-1}/5 =3 ok?

OpenStudy (xapproachesinfinity):

im sorry it is 15/5 which 3 as soumiya said

OpenStudy (anonymous):

thx can you help me with more plz

OpenStudy (anonymous):

What is the equation of a horizontal line passing through the point (2, 10)? y = 12 x = −8 y = 10 x = 2

OpenStudy (xapproachesinfinity):

i did a typo haha

OpenStudy (xapproachesinfinity):

it is 10

OpenStudy (anonymous):

The function d(x) = 3x + 2 determines how many donuts need to be purchased for a meeting, where x is the number of people at the meeting. The office manager uses h(d(x)) to find the amount of money to bring for the donut purchase. The function h(x) = 2x + 7. Solve for how much money to bring when there are 8 people in the meeting.

OpenStudy (anonymous):

i got 59 is it correct

OpenStudy (xapproachesinfinity):

since it passes through the point (2.10)

OpenStudy (anonymous):

ok so

OpenStudy (anonymous):

can you help with the other problem

OpenStudy (xapproachesinfinity):

yes correct

OpenStudy (anonymous):

thats the graph

OpenStudy (anonymous):

Find the average rate of change for the given function from x = −1 to x = 2

OpenStudy (xapproachesinfinity):

I couldn't see the graph

OpenStudy (xapproachesinfinity):

unfortunetly i couldn't reach the page for some reason can you upload it some where else

OpenStudy (anonymous):

yeah

OpenStudy (anonymous):

|dw:1406221963277:dw|

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