Question

A number of kilograms that an object weighs varies directly with the number of pounds. If an object weighs 45 kilograms weighs 100 pounds.
Write an equation in y=mx:

How many kilograms is an object that weighs 70 pounds?

Answer 1

The weight in kilograms of an object that weighs 70 pounds is 31.5 kilograms.

How to calculate the value?

Given that the number of kilograms that an object weighs varies directly with the number of pounds and that an object weighs 45 kilograms weighs 100 pounds.

This will be:

y = mx

y = weight in kilograms

x = weight in pounds

k = constant

45 = 100k

Divide

k = 45/100

k = 0.45

The equation will be written as y = 0.45x

Therefore, when the object weighs 70 pounds, this will be:

y = kx

y = 0.45 × 70

y = 31.5

The weight in kilograms is 31.5kg

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