The ratios should be,
11. no, it's not a constant trend.
12, 1;2
13, The ratio should be multiplying by 10.
I'm not sure about 13
5-2/2
Divide first due to division coming before addition in pemdas
5-1
4
The sides
12-3a
12-3a
4(2a-5)=8a-40
so for perimeter we + them
(12-3a)+(12-3a)+(8a-40)
=
2a-16
Tenth: 243.9
Hundredth: 243.88
Ten: 240
Hundred: 200
B
Changing the order does not change the result of the equation
