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emmainna [20.7K]
4 years ago
14

The variables x and y vary directly. Write an equation that relates x and y, when x = 4 and y = 2

Mathematics
1 answer:
Sholpan [36]4 years ago
8 0
Since x & y vary directly  (it means when x increases, y increases & vice versa)
Then the equation==> y = k.x (k is a constant to be calculated)

But x=4 and y= (given) ==> 2=4k or k= 1/2 & the equation becomes <span>y=1/2 (x)</span>
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Answer:

<h2>z = 6</h2>

Step-by-step explanation:

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Step-by-step explanation:

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A customer charges a treadmill at Annie's Sport Shop. The price is $4,000 and thefinancing charge is 6% per annum if the bill is
elena-s [515]

We have been given that a customer charges a treadmill at Annie's Sport Shop. The price is $4,000 and the financing charge is 6% per annum if the bill is not paid in 30 days. We asked to find the amount of finance charges.

We will use simple interest formula to solve our given problem.

I=Prt, where

I = Amount of interest,

P = Principal amount,

r = Annual interest rate in decimal form,

t = Time in years.

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Since our time if given in days, so we need to convert 30 days into year.

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Upon substituting our given values in simple interest formula, we will get:

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Upon rounding to nearest whole number, we will get:

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