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Answer:
6 humans
Step-by-step explanation:
We're told that a park has dogs and humans, and the total number of legs in the park is 32. Since each human and dogs have 2 and 4 legs each, respectively, an equation can be written to simulate this.
2h + 4d = 32
where h represent humans and d for dogs.
The problem also tells us that the number of dogs is one less than the number of humans, saying if there were 9 humans, the number of dogs would be 8.
We can simulate this as
d = h - 1.
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We're told to find the number of humans in the park, meaning that we need to find the value of h using these two equations.
To solve this system, we can either use substitution or elimination, since the second equation is d written in terms of h, we use the first method.
2h + 4(h - 1) = 32
2h + 4h - 4 = 32
6h - 4 = 32
6h = 36
h = 6
So, there are 6 humans in the park.