Please help me I really need it right now, Find a, for each geometric series described.

23. Sn=218 2/5 an=1 2/5 r= 1/5

The graph shows the charges for a health club in a month. make a function table for the input-output values. writes an equation that can be used to find the total charge y for the number of x classes

Solve each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x

Which equation shows the variable terms isolated on one side and the constant terms isolated on the other side for the equation -1/2x+3=4-1/4x? a. -1/4x=1 b. -3/4x=1 c. 7=1/4x d. 7=3/4x