If every single student met one an another, then you would hear 90 hi's. Since there are 45 different combinations of 2 students meeting another, and since there are 2 hi's each meeting, there would be 90.

I hope that this helps.

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8 0

4 years ago

Read 2 more answers

Help me kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk

Natalija [7]

Answer:

this is not mathmatics

Step-by-step explanation:

5 0

3 years ago

A solid has 14 faces and 12 vertices. How many edges does the solid have? A. 18 edges B. 20 edges C. 22 edges D. 24 edges

sladkih [1.3K]

Answer: D 24

Step-by-step explanation:

7 0

3 years ago

O A. g(x) = 4x^2<br> O B. g(x)=2x^2<br> C. g(x)= 1/4^2<br> O D. g(x)= (1/4x)^2

leonid [27]

Answer:

im pretty sure A. correct me if im wrong please

Step-by-step explanation:

3 0

3 years ago