Answer:
18
Step-by-step explanation:
Note that 75% = 75/100 = 3/4, so 3/4 of the marbles must be blue. Let x be amount of blue marbles added. We can write an equation using this.
75% = 3/4 = (3 + x blue marbles)/(3 + 4 + 3 + x total marbles) = (3+x)/(10+x)
Multiplying by 4(10 + x) on both sides:
3(10 + x) = 4(3+x)
30 + 3x = 12 + 4x
18 = x
Therefore, we must add 18 blue marbles for 75% of the marbles to be blue.
I hope this helps! :)
Answer:
-7
Step-by-step explanation:
5+-7
Answer:
0.18%
Step-by-step explanation:
multiply 200 and 5 by 3. add 5×3 to 93. then divide 108 by 600. that equals 0.18%
Answer:
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Answer:
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Step-by-step explanation:
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<em>:</em><em>)</em>
