In order for a massive star to form a black hole, it must first
a. expand
b. emit x-rays
c. run out of fuel
d. begin rotating faster

Triangle with the the sides 72 and 75 and x. also other trsingle withsides 24 25 and 7. what is the value of x.

Which year held a congressional election and a presidential election

Why did the united states lead a coalition to invade iraq in 1991? o a. there was a fundamentalist revolution in iraq. o b. iraq had invaded iran. o c. an oil embargo had started in the middle east, o d. iraq had invaded kuwait.