Ned took a test with 20 questions. He lost 3 points for each of the 5 questions he got wrong and earned an additional 12 points for answering a bonus question correctly. How many points did Ned receive or lose overall?

What is the value of the discriminant of the quadratic equation -2x = -8x + 8 and what does its value mean about thenumber of real number solutions the equation has?

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.

How can you find the magnitude of a vector, v = < x,y > , where the horizontal change is x and the vertical change is y?