What does x equal

does it equal 6 2/3
does it equal 9
does it equal 12 ?

Y=(x+3)(x-4)(x+1)^2 sulutions? multiplicity?

The wheels of a bicycle have a diameter of 70cm. how many meters will the bicycle travel if each wheel makes 50 revolutions

Jonathan can type 20 documents in 40 minutes ,and susan can type it in 30 minutes and jack can type it in 24 minutes working together ,how much time will it is take them type the same document