Why is this question stumping everyone i meet.

Linda loans her friend $250 with a 5% monthly intrest rate. how much was the whole loan?

The four students in the table below each recorded the time and distance traveled while exercising. exercising distance (miles) time (minutes) gia 2 30 harris 5 50 ian 3 40 jackson 4 80 which list ranks the students from fastest walker to slowest walker? jackson, gia, ian, harris harris, jackson, ian, gia harris, ian, gia, jackson jackson, harris, ian, gia

What is the value of n in the equation -1/2(2n+4)+6=-9+4(2n+1)