20 out of 50 rolls of a number cube resulted in a 2 being rolled. Based on this imformation, if the cube was rolled 220 times, how many rolls of 2 would be expected

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

Me solve this problem, and someone clearly explain to me how to solve it.1.) use the value of the discriminant to determine if the given trinomials has 2 real solutions, 1 real solution, or no real solutions. a.  x2  − 4x  − 7 = 0b. 4r2  + 11r  − 3 = 0c. 3m2  + 7 = 0d.  t2  + 2t  + 1 = 0

For g(x) = 5x - 3 and h(x) = [tex]\sqrt{x}[/tex], find (g · h)(4)