Question

x - 3y + 4z = -9
2x + y + 3z = 6
x - 4y + 3z = -9

Answer 1

New flowers are being planted in acurcular flower bed with a 14-foot dimeter.if each flower requires 1 square foot of space,about how many flowers can be planted

A.308 flowers
B.154 flowers
C.77 flowers
D.66 flowers

can u answer me??

Answer 2

Not sure if you've learned to solve these using matrices but this is the matrix you would start with. You then need to convert it to row echelon form (REF).
\[\left[\begin{matrix}1 & -3 & 4 & -9\\ 2 & 1 & 3 & 6\\ 1 & -4 & 3 & -9\end{matrix}\right]\]