Final answer:
To find the average height of Griffi, Lanco, and Rowi, you need to add their heights and divide by the number of individuals. Use the given information to set up an equation and solve for the average height.
Step-by-step explanation:
To find the average height of Griffi, Lanco, and Rowi, we need to calculate the sum of their heights and divide by the number of individuals.
Let's assume the average height of the three math beasts is x.
If Griffi is 5 inches above average, her height would be x + 5 inches.
If Lanco is 3 inches below average, his height would be x - 3 inches.
Given that Rowi's height is 50 inches, we can set up the equation: x + x + 5 + x - 3 = 3x + 2 = total height of the three math beasts.
We can solve for x by subtracting 2 from both sides: 3x = total height of the three math beasts - 2.
Finally, divide both sides by 3 to find the average height: x = (total height of the three math beasts - 2) / 3.