In January Mr. Tan's students read 20 books. In February, they read 15 books. What is the percent increase or decrease in the number of books the read?

One of the inventors of integrated circuits observed that the number of transistors that fit on an integrated circuit will double every 24 months. what type of relationship most appropriately models this situation?

Follow these steps using the algebra tiles to solve the equation −5x + (−2) = −2x + 4. 1. add 5 positive x-tiles to both sides and create zero pairs. 2. add 4 negative unit tiles to both sides and create zero pairs. 3. divide the unit tiles evenly among the x-tiles. x =

The graph shows the distance kerri drives on a trip. what is kerri's speed . a. 25 b.75 c.60 d.50