Which expression is equivalent to 5 a + 20? 5 (5 a + 4)
5 (a + 4)
5 (a + 20)
5 (a + 1)

According to modern science, earth is about 4.5 billion years old and written human history extends back about 10,000 years. suppose the entire history of earth is represented with a 10-meter-long timeline, with the birth of earth on one end and today at the other end.

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?

If f(x) = 6x – 4, what is f(x) when x = 8? a2 b16 c44 d52