The third one. The two angles don't necessarily have to be equal
The pattern goes +1; +2; +3; +4; +5; +6... Since it ends at +6, the next you need to do is +7. 24 + 7 is 31 and that will come next.
Numbers after 31:
39
48
58
69
81
94
108
.
.
.
By factoring the expression the answer is (3x-2)(x+4). Hope that is helpful.
Use PEMDAS.
P = Parentheses
E = Exponent
M = Multiplication
D = Division
A = Addition
S = Subtraction
This is the order of operations.
For example, let's take the second equation.
36 / 6 + 10 * 66
There are no parentheses or exponents.
So, first we multiply.
36 / 6 + 660
Then we divide.
6 + 660
Then we add.
666
So the equation equals 666.