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Evaluate each expression when n = 75. 1) 12n 2) 36n 3) 28n 4) 56n 5) 87n

Question:

Evaluate each expression when {eq}n = 75 {/eq}.

1) {eq}\;12n {/eq}

2) {eq}\;36n {/eq}

3) {eq}\;28n {/eq}

4) {eq}\;56n {/eq}

5) {eq}\;87n {/eq}

Evaluating an Expression:

To evaluate an expression that is in terms of one or more variables at given values of variables, we just substitute the values of the variables in the given expression and simplify it.

Answer and Explanation:

The given value of the variable is, {eq}n=75 {/eq}.

Substitute this value in each of the given expressions and simplify:

$$\begin{align} &1) \, 12n = 12(75) = \boxed{\mathbf{900}}\\[0.3cm] &2) \, 36 n = 36 (75) = \boxed{\mathbf{2700}}\\[0.3cm] &3) \, 28n = 28(75) = \boxed{\mathbf{2100}}\\[0.3cm] &4) \, 56 n = 56(75) = \boxed{\mathbf{4200}}\\[0.3cm] &5) \, 87 n = 87(75) = \boxed{\mathbf{6525}}\\[0.3cm] \end{align} $$


Learn more about this topic:

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Evaluating Simple Algebraic Expressions

from ELM: CSU Math Study Guide

Chapter 6 / Lesson 3
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