In the diagram, angle 7 equals 30, angle 8 equals 3x, and angle 9 equals 4x-10. Find the value of x

Need on this geometry question. explain how you did it.

Question 3 (essay worth 10 points) (03.06 mc) part a: max rented a motorbike at $465 for 5 days. if he rents the same motorbike for a week, he has to pay a total rent of $625. write an equation in the standard form to represent the total rent (y) that max has to pay for renting the motorbike for x days. (4 points) part b: write the equation obtained in part a using function notation. (2 points) part c: describe the steps to graph the equation obtained above on the coordinate axes. mention the labels on the axes and the intervals. (4 points)

What effect would doubling all the dimensions of a triangular pyramid have on the volume of the pyramid? explain your reasoning.