solve all plzzz with formulas who will solve it fast I will Mark him/her as brainlist
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Samprada1:
what stupid type of anser u gave
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11. total percentage = 100
zinc=30%
nickle=45%
rest all copper = 100-(30+45)=25
total amount of alloy=800g
so mass of copper is = 800×25/100
=200
12. passing mark = 30%
student got=200
lack by=10
so,
30% = 200+10 = 210
30%=210
1%=210/30=7
then,
100%=7×100=700
13. 6%=6943
1%=6943/6=1,157.1666666667
100%=1,157.1666666667×100=115,716.66666666
so price of the machine is = 115,716 (approx)
zinc=30%
nickle=45%
rest all copper = 100-(30+45)=25
total amount of alloy=800g
so mass of copper is = 800×25/100
=200
12. passing mark = 30%
student got=200
lack by=10
so,
30% = 200+10 = 210
30%=210
1%=210/30=7
then,
100%=7×100=700
13. 6%=6943
1%=6943/6=1,157.1666666667
100%=1,157.1666666667×100=115,716.66666666
so price of the machine is = 115,716 (approx)
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