The equation Y equals -4.9 X squared +9.8 X +2 models the trajectory of a ball thrown in air by a man, where Y= the distance The ball is from the ground in meters and X= the elapsed time in seconds. What is the greatest distance the ball is from ground?

Pyotr tchaikovsky sporting goods operates on a 45% overhead based on the selling price, which results in an overhead of $65.34 on the newest version of an air hockey game set. if the air hockey game set costs pyotr tchaikovsky sports $49.32, find the selling price, the markup, and the net profit.

Consider a cube that has sides of length l. now consider putting the largest sphere you can inside this cube without any point on the sphere lying outside of the cube. the volume ratio -volume of the sphere/ volume of the cube is 1. 5.2 × 10−1 2. 3.8 × 10−1 3. 1.9 4. 2.5 × 10−1 5. 3.8

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"