Question

given that y varies directly as x and inversely 2m-1 and that y=5 when x-7 and m=4 .
Calculate
A)the constant of various the
B)the value of when x=2and m=2
The value of m whn y=2 and x=4

Answer 1

Answer:

Step-by-step explanation:

y ∞ x/m

y = kx/m

Where k is the constant of proportionality

A. k = ym/x

y=5 when x=7 and m=4

k = (5×4)/7

k = 20/7

y = 20x/7m

B)the value of when x=2and m=2

y = 20x/7m

y = (20×2)/(7×2)

y = 40/14

y = 20/7

y = 2 6/7

C. The value of m when y=2 and x=4

y = 20x/7m

7ym = 20x

m = 20x/7y

m = (20×4)/(7×2)

m = 80/14

m = 40/7

m = 5 5/7