Iwant someone to me about how to get back to study math after 3years of stop studying plz anyone i don't go to school cand i'm 20 years old

What is the measure of angle tvu shown in the diagram below

What is the value of x in the following equation? -3x-2=2x+8

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