Un dioula achète 2 sacs de riz de même poids et de même valeur il a vendu le premier sac au prix de 35,50 f le kilogramme et a fait ainsi un bénéfice de 422,50 f. Mais le deuxième sac n'a pu être vendu qu'au prix de 28 f le kilogramme de riz et il a eu alors une perte de 65 f . combien pesait chaque sac? quel était le prix d'achat du kilogramme de riz?

I've been working on this for a few days and i just don't understand, it's due in a few hours. you.the direction of a vector is defined as the angle of the vector in relation to a horizontal line. as a standard, this angle is measured counterclockwise from the positive x-axis. the direction or angle of v in the diagram is α.part a: how can you use trigonometric ratios to calculate the direction α of a general vector v = < x, y> similar to the diagram? part bsuppose that vector v lies in quadrant ii, quadrant iii, or quadrant iv. how can you use trigonometric ratios to calculate the direction (i.e., angle) of the vector in each of these quadrants with respect to the positive x-axis? the angle between the vector and the positive x-axis will be greater than 90 degrees in each case.part cnow try a numerical problem. what is the direction of the vector w = < -1, 6 > ?