1. suppose that a , b and c are sets. show that a \ (b u c) (a \ b) n (a \ c).

Step-by-step explanation:

We want to show that

To prove it we just use the definition of

So, we start from the left hand side:

(by definition)

(by DeMorgan's laws)

(since intersection is associative)

(since intersecting once or twice A doesn't make any difference)

(since again intersection is associative)

(by definition)

And so we have reached our right hand side.

the answer is a

step-by-step explanation:

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation: