i just bought a cd changer. i know how to connect everything but i got
a few questions.

1.

there are 3 wires coming from the receiver and it says power. theres a
red one connected to a fuse, a yellow one connected to a fuse,and a
black one.

Im assuming

Red = Accessory 12V+
Yellow = Constant 12V+
Black = Ground

Now,would i be able to connect these wires to the same wires going to
the radio. for example,the ground wire that connects to the radio, i
could split it into 2 wires,then connect one back to the radio and one
to the receiver. same with the accessory 12v+ wire and the constant
12v+ wire??? if not how would i do this. i dont know much about
cars,and i dont want to pay because my ass is very poor right now.

Thanks

You can do exactly that.