Amanda estimates that the product of a fraction and a decimal is 7. Which expression could represent the fraction and the decimal? Two-fifths times 3.5
One-third times 7.02
Three-fifths times 7.1
Six-sevenths times 8.42

Which of the following system of equation is not equal to the system of equations is not equal to the system of equations shown below

Can someone me and do the problem plz so i can understand it more better

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