Chapter 1, Problem 16CT

To determine

To calculate: the value of expression $4r+s^2$ when $s=6\text{ and }r=4$ .

Answer to Problem 16CT

The value of expression $4r+s^2$ is $52$ when $s=6\text{ and }r=4$ .

Explanation of Solution

Given information : consider, the expression provided in the question,

  $4r+s^2$ .

Calculation : to evaluate the expression, it is needed to substitute s by 6 and r by 4, then square of 6 and multiply 4 by 4 after that add both results.

$\begin{array}{l}4r+s^2=4·4+6^2\\ 4r+s^2=16+36\\ 4r+s^2=52\end{array}$ [ square, multiply and add]

Hence,

Thus, The value of expression $4r+s^2$ is $52$ when $s=6\text{ and }r=4$ .