4x2 – 15 = 85
I don’t understand this

Use the x-intercept method to find all real solutions of the equation.x^3-10x^2+27x-18=0

The means and mean absolute deviations of the individual times of members on two 4x400-meter relay track teams are shown in the table below. means and mean absolute deviations of individual times of members of 4x400-meter relay track teams team a team b mean 59.32 s 59.1 s mean absolute deviation 1.5 s 245 what percent of team b's mean absolute deviation is the difference in the means? 9% 15% 25% 65%

Measure of angles 31 (x+4) (3x+9) me