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15 POINTS!
m varies jointly as x and y, and m = 7 when x = 3 and y = 15 solve for m when x = 25 and y = 9. You may use k to represent the constant of variation in working if nesessary

Respuesta :

Ashraf82

Answer:

m = 35

Step-by-step explanation:

∵ m ∝ xy

∴ m = kxy

∵ m = 7 when x = 3 and y = 15

∴ 7 = k (3) (15)

∴ 7 = 45k ⇒ ∴ k = 7/45

∴ m = 7/45 xy

∵ x = 25 and y = 9

∴ m = (7/45) (25)(9) = 35

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