Question

evaluate $5c + cd$ when $c = \frac{1}{5}$ and $d = 15$.

Explanation:

Step1: Substitute \( c = \frac{1}{5} \) and \( d = 15 \) into the expression \( 5c + cd \)

\( 5\times\frac{1}{5}+\frac{1}{5}\times15 \)

Step2: Calculate each term separately

First term: \( 5\times\frac{1}{5} = 1 \)
Second term: \( \frac{1}{5}\times15 = 3 \)

Step3: Add the two results together

\( 1 + 3 = 4 \)

Answer:

\( 4 \)