Please help me. I need the answer.

Find the third,fifth and seventh term sequence described by each rule a(n)=n+1

Four equations are shown below.equation 1: y=2*equation 2: y=2x-5equation 3: y=x2 + 6equation 4: tdentify one linear equation and one nonlinear equation from the list.why each equation you identified is linear or nonlinear.nd one nonlinear equation from the list. state a reasonlinear equation

5cakes cost 3.50 how much do 7 cakes cost