Quick pls!! my math grade is at a B! I need to raise it.

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.

Compare the cost of the bike trips from the two companies shown. for both the cost in a linear function of the number of days which statements is true

What are the solutions of the equation? 5z^2 + 9z - 2 = 0 a. 1, -2 b. 1, 2 c. 1/5, -2 d. 1/5, 2