Răspuns :
a)Notam cu x distanta totala:
prima zi :25%*x=[tex] \frac{25x}{100}= \frac{x}{4} [/tex]
a doua zi : 50%*(x-[tex] \frac{x}{4})= \frac{50}{100}* \frac{3x}{4}= \frac{3x}{8} [/tex]
a treia zi:375 km
[tex] \frac{x}{4}+ \frac{3x}{8}+375=x \\ 2x+3x+3000=8x \\ 3x=3000 \\ x=1000 [/tex] km
Distanta totala este de 1000 km.
b)[tex] \frac{3x}{8}= \frac{3*1000}{8}= \frac{3000}{8}=375 [/tex] km
c)[tex] \frac{p}{100}*1000=375 \\ 10p=375/:10 \\ p=37.5 [/tex]%
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prima zi :25%*x=[tex] \frac{25x}{100}= \frac{x}{4} [/tex]
a doua zi : 50%*(x-[tex] \frac{x}{4})= \frac{50}{100}* \frac{3x}{4}= \frac{3x}{8} [/tex]
a treia zi:375 km
[tex] \frac{x}{4}+ \frac{3x}{8}+375=x \\ 2x+3x+3000=8x \\ 3x=3000 \\ x=1000 [/tex] km
Distanta totala este de 1000 km.
b)[tex] \frac{3x}{8}= \frac{3*1000}{8}= \frac{3000}{8}=375 [/tex] km
c)[tex] \frac{p}{100}*1000=375 \\ 10p=375/:10 \\ p=37.5 [/tex]%
~SPER CA TE-AM AJUTAT!~