∠a and ∠b are vertical angles with  m∠a=x and  m∠b=4x−30 . what is m∠a ?

Which of these choices show a pair of equivalent expressions?

Find the image of a(4, -2) after it is reflected over the line y= 2, then reflected over the line x = 2. (-8,6) o (0.-2) o (0,6) (-8, -2)

Acertain population of bacteria demonstrates exponential growth doubles in size every 4 days. how long will it take the population to triple in size?