## Algebra 1

$79$
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: $=3 \cdot 25 + 4 \\=75 + 4 \\=79$