Hello I don't need the answer to this problem because its only Practice. Its merely there for an example. I am not sure how to do this type of math and I would really appreciate if you wrote a step by step explanation. Please help me. Thank Youu!

Given that abcd is a rhombus, what is the value of x?

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0

Among the most famous of all meteor showers are the perseids, which occur each year in early august. in some areas the frequency of visible perseids can be as high as 40 per hour. given that such sightings are poisson events, calculate the probability that an observer who has just seen a meteor will have to wait at least five minutes before seeing another.