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Andre45 [30]
3 years ago
14

Please help fast!! answer needed quickly ty

Mathematics
1 answer:
Anni [7]3 years ago
4 0
A is the right answer
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The Benny button company ships 63 of buttons by truck each month 140 cases of buttons by train and 112 cases by air. What is he
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315

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Thanks with all of my heart!

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Find an equation of combined variation where a varies directly as b and inversely as c. One set of values is a = 4, b = 12, and
Ber [7]

Answer:

Combined equation is  a =  \frac{kb}{c}

Step-by-step explanation:

a varies directly as b and  inversely as c.

This can be written as

a =k \times b

a =  kb

where k is the proportionality constant

a =  \frac{kb}{c}-------------------------------------(1)

Now lets find the k value bu substituting the given a, b,c values

4 = \frac{k (12)}{9}

9 \times 4 = 12k

36 =  12 k

k = \frac{36}{12}

k = 3

Thus the eq(1) becomes

a =  \frac{3b}{c}

Let us now find the value of a  when b=7  and c = 3

a = \frac{3(7)}{3}

a =\frac{21}{7}

a = 7

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A ship captain looks up at the top of a lighthouse at a 7 degree angle of elevation and calculates that he is 1221 feet from its
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