What value correctly fills in the blank so that the expressions are equivalent? 18 + 45 = blank x (2 + 5) 2 3 7 9

The discrete random variables x and y take integer values with joint probability distribution given by f (x,y) = a(y−x+1) 0 ≤ x ≤ y ≤ 2 or =0 otherwise, where a is a constant. 1 tabulate the distribution and show that a = 0.1.2 find the marginal distributions of x and y. 3 calculate cov(x,y).4 state, giving a reason, whether x and y are independent. 5 calculate e(y|x = 1).

The circulation of a newsletter decreased from 5300 to 3630 find the precentage

An architect is making a model version of your house. she plans to use a 1: 25 scale, which means every inch on the model equates to 25" on your house. if a part of the model measures 7", what would the corresponding measurement be on your house? convert this measurement to feet and inches.