Given that ( 3 4
−2 1
) (
x
y
) = (
14
9
), determine the point (x, y)

Look at arnold's attempt to solve the equation for b: 3b = 12 b = 3 · 12 b = 36 describe the mistake that arnold made.

What are the coordinates of the midpoint of ab? ,1/2) /2,-1) ,-3/2) /2,-2)

Given that abcd is a rhombus, what is the value of x?