How many solutions does this system have?
y--3
-9x-4y = 21
one
two
an infinite number
no solution

What is the correct decimal form of 12%

Which method of gathering data will be most effective in learning how diet and fitness choices affect long-term healt

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).