Answer: 10000-1500=8500 Its simple math really.
A) multiply them
When you have a power of a power you multiply the powers together
Y = 3x - 4 . . . (1)
9x - 3y = 14 . .(2)
Putting (1) into (2) gives
9x - 3(3x - 4) = 14
9x - 9x + 12 = 14
12 = 14
Therefore, there is no solution.
I believe 3cm.
Does it have any options? you may have to round up or down.