A student has taken 5 tests with the current scores: 67%, 82%, 91%, 70%, 69%. What percent score would this student need to earn on their next test to have an average test score of 80%? Round your answer the nearest whole number.​

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

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

The graph of a hyperbola is shown. what are the coordinates of a vertex of the hyperbola? (0, −4) (−3, 0) (0, 0) (0, 5)