which proof has a flaw? ( i need help in my geometry class, and will give brainliest answer if is correct!!) please help :)

If set d is not the empty set but is a subset of set e, then which of the following is true? d ∩ e = d d ∩ e = e d ∩ e = ∅

Sam opened a money-market account that pays 3% simple interest. he started the account with $7,000 and made no further deposits. when he closed the account, he had earned $420 in interest. how long did he keep his account open?

25 ! what is the value of x? enter your answer in the box. x =