3. 4x = 23 + 42 - x
4. 7x = 51 + 45 - x
5. 3(x + 11) = 65 + x - 14
6. 12(x + 5) = x + 122 - 29
Solve Problems 7-10 two ways: (A) using a tree diagram, and (B) using the multiplication principle.
7. How many ways can 2 coins turn up-heads, H, or tails, T-if the combined outcome (H, T) is to be distinguished from the outcome (T, H)?
8. How many 2-letter code words can be formed from the first 3 letters of the alphabet if no letter can be used more than once?
9. A coin is tossed with possible outcomes of heads H, or tails T. Then a single die is tossed with possible outcomes 1, 2, 3,