19 ¿Cuál es el valor de la expresión
algebraica 3x - 5z + 1 cuando r= -0.25 y
z = 2?

When r = -0.25 and z = 2, we have that the equation is:

3x - 9

Step-by-step explanation:

This can be translated to:

Which is the value of the algebraic equation:

3x - 5z + 1    when r = -0.25 and z = 2.

In order to find this we need to replace the values in the equation:

First, you can see that the variable r does not apear in our equation, so that value has no impact in the algebraic equation, now we replace z  = 2.

Now our equation is:

3x -5*2 + 1 = 3x - 10 + 1 = 3x - 9

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