Tell me both the numbers for the 2 boxes pls

Which simplifys to a+ b? a-(1-b)+1 -(1-a)-b+1 (a--1) -1)+1

Adj has a total of 1075 dance and rock songs on her system. the dance selection is 4 times the size of the rock selection. write a system of equations to represent the situation.

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?