Someone help this is an assessment

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 function models the number of accidents per 50 million miles driven as a function

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?