Answer:
1. 27
2.6
Step-by-step explanation:
1.
remember the priorities of operations :
1. brackets
2. exponents
3. multiplications and divisions
4. (and truly last) additions and subtractions
so,
16 + 14÷2 + 3×5 - 11 =
16 + 7 + 15 - 11 = 23 + 4 = 27
2.
5 coins are tossed at the same time.
each coin has a result (head or tail).
but the observed event is the sum of all tails that show when tossing the 5 coins.
so, the possible outcomes are
0 tails
1 ...
2 ...
3 ...
4 ...
5 tails
so, in total, 6 different possible outcomes.
