hobbsruby8 hobbsruby8

07-03-2022
Mathematics

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y is directly proportional to 1 over the square root of x if y = 7 when x = 36 find y when x = 4

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viheg03 viheg03

07-03-2022

Step-by-step explanation:

y |X(the sign for protionality) 1/√x

y = 7 when x = 36

y = k/√x

7 = k/√36

7 = k / 6 cross multiply

k = 7×6

k = 42

find y when x is 4

y = 42/√x

y = 42/√4

y = 42/2

y = 21

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