Twenty seven less than eight times a number is equal to five. What is the number?
2 answers:
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The first thing we must do for this case is to define variables.
We have then:
P: pressure
A: Area of the sole of the shoe
Since the variation is inverse, we have an equation of the form:
We must find the value of k.
For this, we use the following data:
when the shoes have a sole area of 40 in ^ 2 The pressure is 4 lbs / in ^ 2
Substituting values we have:
From here, let's clear k:
Then, the equation is:
Answer:
The equation that relates these variables is:
We have then:
P: pressure
A: Area of the sole of the shoe
Since the variation is inverse, we have an equation of the form:
We must find the value of k.
For this, we use the following data:
when the shoes have a sole area of 40 in ^ 2 The pressure is 4 lbs / in ^ 2
Substituting values we have:
From here, let's clear k:
Then, the equation is:
Answer:
The equation that relates these variables is: