Simplify: 1. 4x−(1−2x)+(2x−7) 2. (3−0.4a)−(10−0.8a)

Ahigh definition tv cost $800 with a down payment of 2/5 of the cost. how much is left to pay, in dollars after the down payment has been made?

Me because some of question i don’t understand

In a graph with several intervals o data how does a constant interval appear? what type of scenario produces a constant interval?