Chapter 1.7, Problem 41E

To determine

To calculate : the value of $\frac{4x^2}{-10}$ when $x=-4$

Answer to Problem 41E

The value of the expression is $-6.4$ when $x=-4$

Explanation of Solution

Given information :

Consider, the expression provided in the question,

  $\frac{4x^2}{-10}$

Calculation :

To evaluate the expression, it is needed to substitute $-4$ for $x$ in expression $\frac{4x^2}{-10}$

Therefore, the value of the expression is obtained as:

  $\begin{array}{l}\frac{4x^2}{-10}=\frac{4{\left(-4\right)}^2}{-10}\\ \frac{4x^2}{-10}=\frac{4\left(16\right)}{-10}\\ \frac{4x^2}{-10}=\frac{64}{-10}\\ \frac{4x^2}{-10}=-6.4\end{array}$

Hence,

The value of the expression is $-6.4$ .