What is the mass of an atom if there are 8 protons, 14 neutrons, 10 electrons?

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 =

Having a hard time understanding this question (see attachment).

Look at the chart showing the results of a baseball player at bat. which is the probability of getting a hit?