6x-8y=-38,5x+12y=99
what is I need some help

What expression is equivalent to 1/2(2+3x-6)

Asquare picture with sides of 32 inches is to be mounted on a square mat with sides of 52 inches. find the area of the mat that will remain uncovered by the picture.

Elena is paid a constant rate for each hour she works. the table shows the amounts of money that elena earned for various amounts of time that she worked.