Find the values of x, y and z

Find the solution of system of equation y= x-4 y=4x+2

Xto the second power plus 14x plus 48. what are the factors? we are doing factoring trinomials with a=1

Danielle earns a 7.25% commission on everything she sells at the electronics store where she works. she also earns a base salary of $750 per week. what were her sales last week if her total earnings for the week were $1,076.25?