Terry is \( n \) years old. Dennis is \( 2 n+5 \) years old. If Terry is 8 years old, how old is Dennis? A 21 B 11 C \( \quad 16 \) D 33

To find Dennis' age when Terry is 8, we substitute \( n \) with 8 in the equation for Dennis' age: \( 2n + 5 \) becomes \( 2(8) + 5 \), which equals \( 16 + 5 = 21 \). So Dennis is 21 years old. The correct answer is A 21. To make math fun, remember that solving age problems can sometimes feel like age detective work! You just need clues (equations) and a little substitution magic to find out who’s older! Now, you can solve these puzzles like a pro!