Answer:
72
Step-by-step explanation:
<em>Since the ratio of blue jays to robin's was 6 to 7 then if there were 84 robins how many blue jays were there.</em>
<em>6 to 7 can also be express as 6/7</em>
<em>Thus, we can set up a proportion</em>
<em>6/7 = x/84</em>
<em>Now, we have to solve for x</em>
<em>x = 72</em>
<em>Hence, if there were 84 robin there would be 72 blue jays.</em>
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<u><em>~lenvy~</em></u>
You haven't supplied the "output value."
Supposing that the "output value" were 15, then F(x) = x + 7 = 15, and x = 8.
If this is what you meant...
Answer:
(x + 5)(x + 4)
Step-by-step explanation:
