April mails 3 packages. The first weighs 14.125 pounds, the 2nd weighs 12.35 pounds, and the 3rd weighs 17.4 pounds. What is the total weight of the packages?

Write an expression that has three terms and simplifies to 4x - 7. identify the coefficient(s) and constant(s) in your expression

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).