Lim 1+2+3+...+n÷1+4+9+...+(2n-1)in the
n-infinite second power

Mary spent a total of $323.14 for a party.she spent a total of $200.22 on food,plus an additional $30.73 for each hour of the party.how long was the party?

Which of the following is true for the relation f(x)=2x^2+1

Solve the equation. 2x - 8(x+1)= 6(2x - 3)