Question

system of equations
8(x)+10(y)=152.50
12(x)+8(y)=171.00
what is x or y

Answer 1

this is what i have so far X= pet store Y= movie
8(x)+10(y)=152.50
12(x)+8(y)=171.00
12(x)+8(y)=171.00- 8(x)+10(y)=152.50
4x-2y= 18.50
2x-y=9.25
2x-9.25=y
and now im lost

Answer 2

\[\left[\begin{matrix}8 & 10 & 152.50\\ \\ 12& 8 &171\end{matrix}\right] \]
using RREF ull get
\[\left[\begin{matrix}1 & 0 &8.75 \\ 0 & 1 &8.25\end{matrix}\right]\]

Answer 3

therefore x=8.75 and y =8.25

Answer 4

im lost that doesn't make any sense to me

Answer 5

wait give a second

Answer 6

ok

Answer 7

ive never heard of this method how did you get the 8 10 12 8 to change to 1 0 1 0?

Answer 8

its the reduced row echelon form

Answer 9

but you can also solve it using elimination method

Answer 10

using elimination process multiply the first equation by -8 and the second by 10