Can u pls help :]
if u also answer the second one i wont be mad.. but u dont have to

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.

It is given that the quadratic equation hx²-3x+k=0, where h and k are constants, has roots [tex] \beta \: and \: 2 \beta [/tex]express h in terms of k