Question

if 7x+2y-6z = 12 and if x,y and z are positive, then what is the value of 2+z/ 7x+2y? A) 1/12 B) 1/6 C) 1/4 D) 5/12 E) 7/12

Answer 1

hitting the enter key helps to make this more readable to those of us who want to help ...

Answer 2

sorry...
I did, but it turned out like that

Answer 3

:) fair enough

Answer 4

if 7x+2y-6z = 12 ;x,y and z are positive

what is the value of (2+z)/(7x+2y)

is the question right?

A) 1/12
B) 1/6
C) 1/4
D) 5/12
E) 7/12

Answer 5

yeah, thanks

Answer 6

I can't find the answer. Only (2+z)/6z

Answer 7

i beleive we have to construct a plane from this ....

Answer 8

7x+2y-6z -12 = 0

trying to recall my vector stuff :)

Answer 9

7(x-Px) +2(y-Py) -6(z-Pz) = 0

such that ..... -7Px -2Py +6Pz = -12

Answer 10

7x+2y-6z = 12 ; /-6 and solve for z to get

-7x/6 -y/3 +z = -2

f(x,y) = z = 7x/6 +y/3 -2

gf = ( 7/6 , 1/3 )

Answer 11

got know idea but this might work; sub in 7/6 for x and 1/3 for y

z = 7(7)/6(6) +(1)/3(3) -2

z = 49/36 +1(4)/9(4) -2(36)/(36)

z = (49 +4 -72)/36 = -19/36

....... guess that is the wrong route to take :)

Answer 12

... o.o"

Answer 13

it might help to know what the section this is in is talking about ...

Answer 14

... I know its an SAT question... but asides from that, I have no idea how to do it, or anything about it....