Find the area of the figure.
a. 71 in2
b. 70 in2
c. 72 in2
d. 58.5 in2

For this case we have that by definition, the area of a square is given by:

In this case, the square is 9 \ in side, then:

On the other hand, the area of a triangle is given by:

Where:

b: It is the base of the triangle

h: It is the height

We have according to the figure that:

So:

Finally, the area of the figure is:

In the aquarium there are 18 green fish

Step-by-step explanation:

Let's call "y" the amount of yellow fish in the aquarium.

Let's call "g" the amount of green fish in the aquarium

We know that:

The aquarium has 6 yellow fish less than green fish

This means that:

We also know that:

40 percent of the fish are yellow:

Now substitute the first equation in the second and solve for g