Quatre filles et trois garçons veulent s'asseoir sur un banc . 1° Trouver le nombre total de possibilités.
2° De combien de façons peut-on asseoir ces personnes :
a) si on veut alterner les filles et les garçons ?
b) si les filles se mettent l'une à côté de l'autre ainsi que les garçons ?

Question: what is the value of x 4x-2= (-7) +5x. it would be greatly appreciated if someone could actually explain to me step by step

The first few steps in solving the quadratic equation 9x2 + 49x = 22 ? 5x by completing the square are shown. 9x2 + 49x = 22 ? 5x 9x2 + 54x = 22 9(x2 + 6x) = 22 which is the best step to do next to solve the equation by completing the square? 9(x2 + 6x + 3) = 25 9(x2 + 6x + 3) = 49 9(x2 + 6x + 9) = 31 9(x2 + 6x + 9) = 103

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels