Find the measurement of angle 7

Iwant to know what 3g+5h+4g-2h is my teacher is too selfish to tell us

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?

Graph the system of inequalities presented here on your own paper, then use your graph to answer the following questions: y < 4x − 8 y is greater than or equal to negative 5 over 2 times x plus 5 part a: describe the graph of the system, including shading and the types of lines graphed. provide a description of the solution area. (6 points) part b: is the point (5, −8) included in the solution area for the system? justify your answer mathematically. (4 points)