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kolbaska11 [484]
3 years ago
15

Rachel is a lunchroom supervisor at West School. The children eat lunch at 15 long tables. When all tables are used, 240 childre

n can eat at one time. How many seats are there at each table?
Mathematics
2 answers:
Eva8 [605]3 years ago
7 0

Answer:

16 seats per a table ok man

Diano4ka-milaya [45]3 years ago
6 0
240÷15=16 seats at each table

Since there were 15 tables and 240 in total you have to divide to find the number of seats at a table
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Answer:

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Step-by-step explanation:

To find cos 45° we must first find the adjacent and the hypotenuse

Let the adjacent be x

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To find the adjacent we use tan

tan ∅ = opposite / adjacent

From the question

the opposite is 9

So we have

tan 45 = 9 / x

x tan 45 = 9

but tan 45 = 1

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Since we have the adjacent we use Pythagoras theorem to find the hypotenuse

That's

h² = 9² + 9²

h² = 81 + 81

h² = 162

h = √162

h = 9√2

Now use the formula for cosine

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The adjacent is 9

The hypotenuse is 9√2

So we have

cos 45 = 9/9√2

We have the final answer as

<h3 /><h3>cos 45 = 1 / √2</h3>

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