Chapter 4.3, Problem 55E

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7th Edition

Stefan Waner + 1 other

ISBN: 9781337274203

Textbook Problem

In Exercises 51-56, x, y and z represent the weights of the three ingredients X, Y, and Z in a gasoline blend. Say which of the following is represented by a linear equation in x, y, and z, and give a form of the equation when it is.

There is at least 30% ingredient *Y* by weight.

To determine

If the condition forms a linear equation in *X*, *Y* and *Z* in a gasoline blend. And the blend contains at least 30% of ingredient *Y* by weight.

Explanation

Since the *X*, *Y* and *Z* in a gasoline blend.

It is mentioned that the blend contains at least 30% of ingredient *Y* by weight.

Therefore, it can be rephrased as the amount of *Y* is more than or equal to 30% of the total weight

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