Jocelyn worked 2 summer jobs. She babysat for 25 hours and worked at the grocery store for 15 hours. Write an expression that describes her earnings.

Let the amount she earns for babysitting be $x per hour, and $y per hr at grocery store.

hence in 25hrs, she would earn $25x for babysitting and $15y working at the store for 15 hours.

earnings = $ (25x+15y)