The expression represents the total number of points Mona will earn if she catches x fish, y octopus, and z crabs is 30x + 80y - 15z.
<h3>What is an expression?</h3>
In mathematics, an expression is defined as a set of numbers, variables, and mathematical operations formed according to rules dependent on the context.
Given to us
30 points for fish
80 points for Octopus
-15 points for crab
As it is given in the problem that Mona catches x number of fishes, y number of octopuses, and z number of cabs. therefore,
Points earned through fishes ![=x \times 30 = 30 x](https://tex.z-dn.net/?f=%3Dx%20%5Ctimes%2030%20%3D%2030%20x)
Points earned through Octopus ![=y \times 80 = 80 y](https://tex.z-dn.net/?f=%3Dy%20%5Ctimes%2080%20%3D%2080%20y)
Points earned through crabs![=z \times -15= -15 z](https://tex.z-dn.net/?f=%3Dz%20%5Ctimes%20-15%3D%20-15%20z)
Total points earned by Mona in the video game
= Points earned through fishes, octopus, and crabs
![=30x + 80 y -15z](https://tex.z-dn.net/?f=%3D30x%20%2B%2080%20y%20-15z)
Hence, the expression represents the total number of points Mona will earn if she catches x fish, y octopi, and z crabs is 30x + 80y - 15z.
Learn more about Expression:
brainly.com/question/13947055