Its 3 cause 160 x 4 is 640 , so 643 - 640 is 3 so the answer of the problem is 3
Answer:
25
Step-by-step explanation:
<ABD=<BDC
Check it out
There's more than one way to combine them really
but an obvious one will be
(7 + i) - (6 - 2i) = 7 + i - 6 + 2i = 1 + 3i