There are 72 fish in an aquarium. 1/6 of them are angelfish and the rest are mackerals. When more angelfish are placed in the aq
uarium, the fraction of angelfish increases to 7/10. How many angelfish are there in the aquarium now?
1 answer:
If it is the normal rate, there are 12 angelfish
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Answer:
2.8+.55x=5 x=4
Step-by-step explanation:
5-2.8=2.2
2.2/.55=4
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Answer:
{x+y=36
0.1x+0.25y=5.4
Step-by-step explanation:
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Answer:
(3.5, 2.75)
source: trust me bro
1.7a + 0.3a = 0.8;
(1.7 + 0.3)a = 0.8;
2 x a = 0.8;
a = 0.8 ÷2;
a = 0.4;
