Solve the following proportions:

2/3x+2=-4/5x-1/5

In an experiment you are to flip a two sided coin 100 times and record 55 heads up and 45 tails up determine the theoretical and experimental probability of getting a heads up in the experiment.

Ill mark the brainliest if you me with the these three questions 7,8,9

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