When writing a repeating decimal as a fraction, why does the fraction always have only 9s

Teams of 4 are competing in a 1/4 mile relay race. each runner must run the same exact distance. what is the distance each teammate runs?

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

There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?