Question

Algebra 2 help please

Answer 1

The first one I would say is B
If you write out the equations.
x + y = 12
3x + 2y = 32
And just put it into matrix form

Answer 2

its between A or B for the second one. I wanna say B for it

Answer 3

It's A.
If you solve the equation like this
x + y = 12
Subtract y on both sides.
x = 12 - y
3x + 2y = 32
Substitute x into the second equation.
3(12 - y) + 2y = 32
Distribute.
36 - 3y +2y = 32
36 - y = 32
Subtract 36
-y = -4
so y = 4.
So the choice with y = 4 is the answer.

Answer 4

So its A. thank you so much.(:

Answer 5

Yepp. No problem.

Answer 6

\[\left[\begin{matrix}1 & 1 \\ 3 & 2\end{matrix}\right]\ \left(\begin{matrix}x \\ y\end{matrix}\right)=\left(\begin{matrix}12 \\ 32\end{matrix}\right) \]
x+y=12
3x+2y=32
2x+2y=24
subtract from above
3x+2y-2x-2y=32-24
x=8
8+y=12
y=12-8=4

Answer 7

35.
\[\left(\begin{matrix}x \\ y\end{matrix}\right)=\left(\begin{matrix}8 \\ 4\end{matrix}\right)\]
x=8
y=4