16 Which expression is represented by the model shown below?

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 =

Find the solution of each of the following.

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?