De cuántas formas pueden mezclarse los siete colores del arco iris tomándolos de tres en tres?
1 answer:
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Answer:
6
Step-by-step explanation:
Given expression:
a varies directly as b;
a ∝ b
So;
a = kb where k is the constant of proportionality;
if a= 7 and b = 2;
7 = 2k
k =
Now, find b when a = 21
21 = x b
b = 6
Hope this helps.
Brainliest would help me as well.