Answer:
non of the above thanks
don't ask me again please
The answer to the question is a
<em>Hi!</em>
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<em>These can be set up as systems of equations.</em>
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<em>Let b = the number of birds, and let d = the number of dogs.</em>
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<em>b + d = 21</em>
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<em>2b + 4d = 76 (this is because birds have 2 legs and dogs have 4 legs.)</em>
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<em>You can solve this using either elimination or substitution.</em>
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<em>Consider marking brainliest.</em>
The answer to this is 500 my friend. 10 times 10 equals 100. 100 times 5 equals 500. hope this helps:)
