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OverLord2011 [107]
3 years ago
7

a bird 7 ft in the air flies down to the ground what integer would you use to represent the change in the bird's position

Mathematics
2 answers:
Cerrena [4.2K]3 years ago
5 0
ANSWER(S):

-7

EXPLANATION(S):

original position: 7
change from original position: -7
77julia77 [94]3 years ago
4 0
Negative 7, since its referring to the change in postion, and the bird went downwards, signifying that it is negative.
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The way you find profit is to subtract the revenue and the cost
Profit = Revenue - Cost
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So the equation given is
P = 7.5n - (2.25n+15)
and its in the form
P = R - C
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R = 7.5n is the revenue equation
C = 2.25n+15 is the cost equation

Focus on the revenue equation
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This tells us that Sandra pulls in a total of 7.50*n dollars where n is some positive whole number. It represents the number of necklaces sold. For example, if she sold n = 10 necklaces, then
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As you can see above, the revenue is computed by multiplying the price per necklace ($7.50) by the number of necklaces sold (n) to get R = 7.50*n

So that's why the answer is $7.50

Note: The 2.25 is part of the cost equation. This is known as the variable cost. It is the cost to make one necklace ignoring the fixed cost (eg: rent). The variable cost often doesn't stay the same, but algebra textbooks often simplify this aspect. 
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