Para las siguientes funciones determina el dominio, intersecciones con ejes coordenados y simetrias. SOlo necesito el dos plis

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

If the cost to mail a package is an initial $5 and $0.28 for every pound the total cost to mail a package was $11.27, how much did the package weigh?

Find the least common denominator for thesetvo rational expressions. n^2/n^2+4n+4 -3/n^2+7n+10