The diagonals of the parallelogram are congruent.
He wants the page to have one of each of the four varieties on it. There are 9 daisies to choose from, 7 roses, 5 dandelions, and 2 pansies, so there are
9*7*5*2 = 630
ways of arranging one of each on the page.
3 - 4 = - 10
3 x = - 10 + 4
3 x = - 6
x = - 6/3 = - 2
