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Paraphin [41]
2 years ago
14

*FIRST PERSON TO GET IT RIGHT AND ANSWER FIRST GETS BRAINLIEST*

Mathematics
1 answer:
polet [3.4K]2 years ago
8 0

There are 23 sharks and 7 octopi in the aquarium

  • Let the number of sharks in the aquarium be x
  • Let the number of octopi in the tank be y

If the total number of animals in the tank is 30, therefore;

  • x + y = 30 ....................... 1

If the total number of legs in the tank is 171 with starfish having 5 legs and Octopus having 8 legs, the required expression will be:

  • 5x + 8y = 171 ................ 2

From equation 1, x = 30 - y ................... 3

Substitute equation 3 into 2 to have:

5(30-y) + 8y = 171

150 - 5y + 8y = 171

3y = 171 - 150

3y = 21

y = 7

Recall that x = 30 - y

x = 30 - 7

x = 23

Hence there are 23 sharks and 7 octopi in the aquarium

Learn more on simultaneous equation here: brainly.com/question/148035

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