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Nyla
07-18-2013, 03:43 PM
SAT math arithmetic mean

Could you help with the following SAT math question:
"Find the arithmetic mean of x,y, and z If 4x+3y=7 and y+4z=17"

Thanks!!

Jack
07-18-2013, 03:51 PM
SAT math arithmetic mean


"Find the arithmetic mean of x,y, and z If 4x+3y=7 and y+4z=17"

Adding the given equations you have 4x+4y+4z=24

and then divide by 4 the previous equation gives you

x+y+z=6

Therefore the arithmetic mean of these three variables are:

\frac{x+y+z}{3}=\frac{6}{3}=2

Nyla
07-18-2013, 03:51 PM
Thanks Jack;)