Which expression is a trinomial? x + y – 13 4xyz

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?

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?

Isaac wants the equation below to have no solution when the missing number is placed in the box. which number should he place in the box?