Luis left a 15% tip on a $30.00 food bill. how much did he leave for the tip?

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

What is the value of x in the equation (2)3) (x+6)= -18 a. -36 b. -33 c. -24 d. -18

A. what does the point (4, 122) represent? b. what is the unit rate? c. what is the cost of buying 10 tickets?