hardwick744
17.02.2021 •
Mathematics
If x and y vary directly and x=25 when y=100 find x when y=24.
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Ответ:
x = 6
Step-by-step explanation:
Given that x and y vary directly then the equation relating them is
y = kx ← k is the constant of variation
To find k use the condition x = 25 when y = 100 , then
100 = 25k ( divide both sides by 25 )
4 = k
y = 4x ← equation of variation
When y = 24 , then
24 = 4x ( divide both sides by 4 )
6 = x
Ответ:
The answer is 10
Step-by-step explanation: