Kenichi took $72 to a concert. If he paid for 5 tickets that each cost d dollars, how much did he still have left? Write an expression to represent the difference in cost with d dollars.

The expression represents the difference is (72 - 5d) dollars

Step-by-step explanation:

Let us solve the question

∵ Kenichi took $72 to a concert

∴ The total money with him = 72 dollars

∵ He paid for 5 tickets that each cost d dollars

→ That means he bought 5 tickets each cost d dollars

∴ The cost of the tickets he paid = 5 × d

∴ The cost of the tickets he paid = 5d dollars

∵ The money left with him = total money he has - the amount he spent

∵ The total money = 72 dollars

∵ The amount he spent = 5d dollars

∴ The money left with him = 72 - 5d  

∴ The expression represents the difference is (72 - 5d) dollars.

step-by-step explanation:

i'm pretty sure it would take 20 hours because it's half the men so you multiply the number of hours it takes by 2