5questions. !
1.) which expression is equal to 2x/x+2 - x-3/x+5?
2.) which expression is equal to (c^2-4)/(6c^4+15c^3)/(c^2+4c+4)/(12 c^3+30c^2)?
3.) which expression is equal to 3x/x+3 + x+2/x?
4.) which expression is equal to (4p^2+32p)/(p-2) * (p^2+p-6)/(2p^3+16p^2)?
5.) enter the simplified form of the complex fraction in the box. assume no denominator equals zero.( 5x+10)/(x-3)/ (10)/(x^2-6x+9)

Exercise: counting committees 0.0/2.0 puntos (calificable) we start with a pool of n people. a chaired committee consists of k≥1 members, out of whom one member is designated as the chairperson. the expression k(nk) can be interpreted as the number of possible chaired committees with k members. this is because we have (nk) choices for the k members, and once the members are chosen, there are then k choices for the chairperson. thus, c=∑k=1nk(nk) is the total number of possible chaired committees of any size. find the value of c (as a function of n ) by thinking about a different way of forming a chaired committee: first choose the chairperson, then choose the other members of the committee. the answer is of the form c=(α+nβ)2γn+δ. what are the values of α , β , γ , and δ ?