The given diagram contains how many pairs of vertical angles?

What is the least common multiple of 16 and 3?

Is δ pmr similar to δ smn ? if so, which postulate or theorem proves these two triangles are similar?

Aheated piece of metal cools according to the function c(x) = (.5)x ? 7, where x is measured in hours. a device is added that aids in cooling according to the function h(x) = ? x ? 2. what will be the temperature of the metal after two hours?