Me with number 7 i will give brainlest to whoever explains and shows the work

Since you're looking for students who scored at least 81, then you're looking at the last two rows on the table, because 81-90 and 91-100 are all at least 81. Add those number of students together, 20 + 7 = 27

Now, add up all the students in the table, which should equal 50. Since 27 out of 50 students made at least an 81, divide the numbers.



Move the decimal to the right two times, and your answer will be 54%

Set up a system of equations