Usted buscó: you would be so pissed off at me (Español - Italiano)

then you would have that, after multiplying the number of men (m) by more than the unit (5/3 is more than 1), the number of women (w) would be larger than the number of men, so you would be able to correct your expression. it is convenient here to remember what we said about the effect of multiplying by more than 1 (that is, increasing), or by less than 1 (that is, decreasing). so we need to multiply the number of men (m) by 3/5 (less than 1), to obtain a smaller number of women (w), as we had said: w = (3/5) * m 3) we substitute the value of one of the unknowns in the initial expression, using our second equation, to leave it with only one unknown, this way: first expression: (m * 178) + (w * 170) m + w second expression: w = (3/5) * m substituting win the first expression: (m 178) + [(3/5) * * 170] + (3/5) * reducing by addition and multiplication: (m * 178) + (m * 102) 102) m + (3/5) * 107
let us explain this method to review how to solve equations with two unknowns. 1) we establish our initial expression with the general formula: (number of men * their size) + (number of women * their size) number of men + number of women replacing with the values of the graphic in nco class (average size of men, 178 cm; average size of women, 170 cm), and the unknown figures m and w: (m * 178) + (w * 170) m + w 2) we write a second expression to relate our unknown figures, indicating how to calculate one of them starting from the other one. in this exercise, we know that, in nco class, there are three women for every five men, so the number of women divided by 3 must be equal to the number of men divided by 5: w / 3 = m / 5 from which: w = (3/5) * in case you had any doubt about how to build this second expression, that is to say, if you should multiply "m" by 3/5 or 5/3, think about how the numbers of men and women have to be: "three women for every five men" means that there are fewer women than men, obviously. so if you decided to use, with the nerves and hurries at the exam, the wrong expression: w / 5 = m / 3 w = (5/3) * m 106