7+8 is the answer
But it can also be 11
The best definition for the term substitution would be...
the action of replacing someone or something with another person or thing.
The answer is 2.22 if you divide it. Add the ingredients then divide on how many servings.
<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>
