help please its math and i dont knon how to solve them



Answer:
1. It is doubled
I can't help with paragraph explanation as it is something that you should write
2. The change in the area is that is 16 times more
No explanation as it is something that you should write
3. The change in area is that it is 9 times less
I can't help with paragraph explanation as it is something that you should write
Step-by-step explanation:
20 + 16 = 36
40 + 32 = 72
72/36 = 2
Hence it is doubled
(5 x 6) / 2 = 15
(20 x 24) / 2 = 240
240/15 = 16
It is 16 times more
15 x 21 = 315
5 x 7 .= 35
315/35 = 9