(x • 2) + 3 is the algebraic expression.
If the first term is 4, then it is followed by 11, 25, 53.
Simply replace the ‘x’ by whatever term is followed.
Major volcanic events that have occurred within the Ring of Fire since 1800 included the eruptions of Mount Tambora (1815), Krakatoa (1883), Novarupta (1912), Mount Saint Helens (1980), Mount Ruiz (1985), and Mount Pinatubo (1991).
