Chapter 1, Problem 14CT

To determine

To calculate: the value of expression $3.5s+r$ when $s=6\text{ and }r=4$ .

Answer to Problem 14CT

The value of expression $3.5s+r$ is $25$ when $s=6\text{ and }r=4$ .

Explanation of Solution

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

  $3.5s+r$ .

Calculation : to evaluate the expression, it is needed to substitute s by 6 and r by 4, then multiply 6 with 3.5 and the result with 4 .

$\begin{array}{l}3.5s+r=3.5·6+4\\ 3.5s+r=21+4\\ 3.5s+r=25\end{array}$ [substitute , multiply add]

Hence,

Thus, The value of expression $3.5s+r$ is $25$ when $s=6\text{ and }r=4$ .