Aequação x³ - 147x + 686 = 0 tem por raízes os números 'm' e 'n', sendo m raiz dupla e 'n' = - 2m. nessas condições, o valor de m + n é?

The scale for a map is 20 miles = 1/2 inch. the distance between two towns on the map is 3 3/4 inches. what is the actual distance between these towns? 150 miles 38 miles 75 miles 135 miles

Select all of the quadrants that the parabola whose equation is y=√x-4 (principal square root) occupies. i ii iii iv

Which ordered pair is a solution to the system of linear equations? 2x + 3y= 6 –3x + 5y = 10