How many ways can 3 yearbooo posters out of a total of 6 posters be displayed across a wall?

Anyone know? is appreciated! will mark brainliest if correct!

When only separate discreet points are graphed it is called?

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 =