Question

repede, va implor, dau coroana!!! ​

Answer 1

Răspuns:

1) ms=800g

md=?

mapă=?

C=15%

md=C×ms/100

md=15×800/100

md=120g

ms=md+mapă=> mapă=ms-md

mapă=800g-120g

mapă=680g

2) ms=100g

md=40g

mapă=?

C=?

ms=md+mapă=>mapă=ms-md

mapă=100g-40g

mapă=60g

C=100×md/ms

C=100×40/100

C=40%

3) ms=?

md=25g

mapă=225g

C=?

ms=md+mapă

ms=25g+225g

ms=250g

C/100=md/ms

C/100=25g/250g => C=100 md/ms=100 25g/250g

C=10%

4) ms=60g

md=?

mapă=?

C=12%

md=C×ms/100

md=12×60g/100

md=7,2 g

ms=md+mapă => mapă=ms-md

mapă=60g-7,2 g

mapă=52,8 g