Tracy's team won 75% of their games last year. They played 12 games. How many games did they win?

9 games.

Step-by-step explanation:

You need to find 75% of 12. 75% is equal to three fourths. 12 divided by 4 is 3, so one fourth of 12 is 3. 3 times 3 is 9, so three fourths (75%) of 12 is 9.

Blue fish = 20

Step-by-step explanation:

Let x be the number of blue fish in the aquarium.

The aquarium has 10 more red fish than blue fish.

Number of red fish = x+10

Total number of fished = x + (x+10) = 2x+10

It is given that 60 percent of the fish are red. It means number of red fishes is equal to 60% of total fishes.

Isolated variable terms of left side.

Divide both sides by -0.2.

Therefore, the number of blue fishes is 20.