How would you go about solving these problems using a chart to help? I tried them, but for some reason I keep getting them wrong (I checked the answers in the back of my book, which does not give an explanation as to how to solve).

1. Thirty students bought pennants for the football game. Plain pennants cost $4 each and fancy ones cost $8 each. If the total bill was $168, how many students bought the fancy pennants?

2. Mimi paid $1.50 each for programs to the game. She sold all but 20 of them for $3 each and made a profit of $15. How many programs did she buy? (Selling price - purchase price = profit)

3. A plumber makes $4.50 per hour more than his apprentice. During an 8-hour work day, their combined earnings total $372. How much does each make per hour?

4. Warren has 40 coins (all nickels, dimes, and quarters) worth $4.05. He has 7 more nickels than dimes. How many quarters does Warren have?

DIZ L00KZ LYK AL UR H0MEW0RK BUT IL JUS HELP U 4 DHA 1ST 1 N DEN U CAN C H0W I D ET AIIGHT L0LZ 0K.

1) 42 <--- that's ur answer =D
4/168
16
----
08
jus divide til u get daa answer ok