7+7+7+7+7+7+7+7=56
56-14=42
answer=42cm
5. Basically you need to add the terms in the same positions in both matrices, so:
2 + 6 = 8 1 + (-4) = -3
-3 + 2 = -1 0 + 4 = 4
So the answer would be the first one :)
6. This one is not possible as to add or subtract matrices they must have the same order, which is not the case with this pair.
Answer: 1 : 3
Shaded area:

Unshaded area:

Ratio of shaded to unshaded:

Add 1
0.7+1=1.7
1.7+1= 2.7
etc., etc.
Answer:
14 squared
Step-by-step explanation: