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3 years ago

11

6 people meet for a business lunch. Each person shakes hands once with each other person present. How many handshakes take place

?
a. 30
b. 21
c. 18
d. 15
e. 10

1 answer:

CaHeK987 [17]3 years ago

6 0

30 handhakes, you obviously dont shake your own hand do 6*5 =30

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Read 2 more answers

Triangles P Q R and S T U are shown. Angles P R Q and T S U are right angles. The length of P Q is 20, the length of Q R is 16,

dimaraw [331]

Answer:

$\angle P$

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$\triangle PRQ = \triangle TSU = 90^o$

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<em>See attachment</em>

Required

Which sine of angle is equivalent to $\frac{4}{5}$

Considering $\triangle PQR$

We have:

$\sin(P) = \frac{QR}{PQ}$ --- i.e. opposite/hypotenuse

So, we have:

$\sin(P) = \frac{16}{20}$

Divide by 4

$\sin(P) = \frac{4}{5}$

Hence:

$\angle P$ is correct

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