If y varies directly as x and y is 180 when x is n and y is n when x is 5, what is the value of n?

Answer

Find out the value of n .

To proof

As given

y varies directly as x

thus

y = kx

Where k is the constant of proportionality .

As given

y is 180 when x is n

180 = kn

y is n when x is 5

n = 5k

Compare the value of k .

solving

n² = 900

n = √900

n = 30

Therefore the value of n is 30 .

Hence proved

unpaid balance is : $149.99-$50 = $99.99 new balance = 149.99+2.62-50 = $102.61 finance charge = 99.99- 0.21/12= $1.75 new balance = 99.99+1.75 = $101.74 average daily balance method average daily balance= 3399.70/30 = $113.32 finance charge = $ 0.21/12ă—113.32 = $1.98 new balance = $149.99-50+1.98 = $101.97

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