3 men can build a wall in 10 hours how many men would be needed to build the wall in 7.5 hours?

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?

Suppose i flip two identical coins. what is the probability that i get one head and one tail?

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)