!!!!!!!!!!!!!! 2in1 !!!!!!!!!!! Urgent !!!!
1) Calculati media aritmetica a numerelor: a=8-3 \sqrt{7} + \frac{1}{2} (3+ \sqrt{7} ) ^{2} si b=24.

2) O firma are 120 de angajati. Determinati numarul barbatilor angajati in firma , stiind ca numarul femeilor reprezinta 20% din numarul barbatilor .

MULTUMESC!

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Răspunsuri

2014-05-08T22:05:53+03:00
a=8-3\sqrt7+\dfrac12(9+6\sqrt7+7)

a=8-3\sqrt7+\dfrac12(16+6\sqrt7)

a=8-3\sqrt7+8+3\sqrt7=16

m_a=\dfrac{a+b}{2}=\dfrac{16+24}{2}=20

2)

x= numarul barbatilor

20x/100=x/5=nr. femeilor

x+x/5=120

6x=120·5

x=20·5=100 barbati

Femei= 100/5=20

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