exam Maths Puzzle Numerical Ability

EX: JK=JK OR AB=AB
what is the property that is illustrated by that statment?

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exam Other Question

I am now stuck on the factoring by group.

45x^2 + 39x + 6

I wish math came easier to me! I think I have some of it just not to sure
3(15x^2 + 13x + 2)
Assume the following statements:
P= The temperature is 70 degrees
Q= It is Raining
R= There is no wind

Find the following statement in word form: Q --> (~R upside down v ~P)