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Firdavs [7]
3 years ago
7

I also bought $7$ different postcards. How many ways can I send the postcards to my $3$ friends, so that each friend gets at lea

st one postcard?
How do i count the restriction that each friend must get at least 1 or more postcards and the postcards are distinguishable?
Mathematics
1 answer:
harina [27]3 years ago
5 0
Bruh how’s it gonna tell me incorrect answer when it was right
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What two parts of a regular polygon are congruent?
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Please help me with this question :) thanks.
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Answer:

Opposite sign

Step-by-step explanation:

You can find this because when a point is reflected across the x-axis, its y-coordinate changes its sign. The same is true when reflected across the y-axis. It's x coordinate changes its sign.

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Which congruent theorem can be used to prove..
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Answer:

Two angles and the non-included side of one triangle are congruent to the corresponding parts of another triangle. Which congruence theorem can be used to prove that the triangles are congruent? Two sides and the included angle of one triangle are congruent to the corresponding parts of another triangle.

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Can somebody please help me
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Answer:

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\frac{3}{10} *\frac{2}{9} =\frac{1}{15}

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