Answer pls ASAP thanks for answering if it is answered

What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?

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

Find the value of x that will make l ll m