Răspunsuri

2014-05-22T21:06:30+03:00
Ma=(a+b)/2=7,5

a+b=7,5*2
a+b=13
a=13-b

mg=√a*b=6

√b(13-b)=6  |²
b(13-b)=36
13b-b²=36
13b-b²-36=0 |-1
b²-13b+36=0
b²-4b-9b+36=0
b(b-4)-9(b-4)=0
(b-4)(b-9)=0
b-4 =0   b-9=0
b=4     b=9

a=13-4=9
a=13-9=4

b)p% din b=a
p/100*4=9
p/100=9/4
p=900/4
p=225%
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  • Utilizator Brainly
2014-05-22T21:17:07+03:00
Ma=(a+b)/2=7,5

a+b=7,5*2
a+b=13
a=13-b
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