It takes one examiner 15 hours to mark 80 exam papers. How long should it take 5 examiners to mark 80 exam papers?

Cassie is traveling 675 miles today to visit her brother and his family. so far, she has stopped for gas three times. at the first stop, she put in 7.1 gallons of gas and paid $23.79. at her second stop, she put in 5.8 gallons of gas and paid $19.08. and, at the third stop, 6.6 gallons and paid $20.39. at which stop did casey pay the most for gas?

Lydia collected two sets of data one set of data shows an outlier. which set has an outlier, and which number is the outlier?

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)