Practice problem
Can you figure out what xxx and yyy are? [x25y]×4=[2882040]\begin{bmatrix} x&2\\ 5&y \end{bmatrix} \times 4 = \begin{bmatrix} 28&8\\ 20&40 \end{bmatrix}[x52y]×4=[2820840]
x=28,y=40x = 28, y = 40x=28,y=40
x=7,y=10x = 7, y = 10x=7,y=10
x=6,y=10x = 6, y = 10x=6,y=10
x=7,y=20x = 7, y = 20x=7,y=20
Type a concept, like “slope” or “photosynthesis”.
