Tammy works as a tutor for PLEASE HELP Tammy works as a tutor for $13 an hour and as a waitress for $8 an hour. This month, she worked a combined total of 91 hours at her two jobs. Let t be the number of hours Tammy worked as a tutor this month. Write an expression for the combined total dollar amount she earned this month.

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?