2nd equation: 8 x-y=10 ⇒ y= 8 x-10 We will switch that in 1st equation: 8 x-10=x²+12 x+30, or: x² + 4 x +40 = 0, a=1,B=4, c=40 Discriminant : D= b² - 4 ac= 16 - 160 = -144 and because it is negative there are no real solutions. D)
The human resources manager at a company records the length, in hours, of one shift at work, x. he creates the probability distribution below. what is the probability that a worker chosen at random works at least 8 hours? probability distribution px(x) 6 hours 7 hours 8 hours 9 hours 10 hours 0.62 0.78 пол
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