Answer
$79$
Work Step by Step
Substitute the values of $c$ and $d$ into the expression to have:
$=3 \cdot 5^2 + 4
\\=3 \cdot (5 \cdot 5) +4$
Perform multiplication ahead of addition to obtain:
$=3 \cdot 25 + 4
\\=75 + 4
\\=79$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.