Hard question plz help

If olu is twice as old as funmi if the sum of their ages is 60 how old is olu

The graph shows the distance kerri drives on a trip. what is kerri's speed?

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?