To calculate the new wage, start off by taking $9.25 × 0.04 = $0.37. Then add that number (the amount of Mark's raise) to his original hourly wage. Mark's new hourly wage is $9.25 + $0.37 = $9.62.

Don't let the number of miles traveled confuse you -- you don't use them to solve the problem. 2/5 of a 40- hour workweek is 2/5 40/1 = 80/5. Reduce the fraction: 80 ÷ 5 = 16 hours per week spent traveling.

5 pounds of cashew nuts at $1.80 per pound is worth
5xS1.80 = $9.00.
4 pounds of peanuts at S1.62 per pound is worth 4 x $1.62 = S6.48. The total value of the 9-pound mixture is $9.00 + $6.48 = $ 15.48. The value of the mixture per pound is found by dividing the total value by the number of pounds.
$15.48 / 9 = $1.72