determine the value of the constant c that makes the function f(x, y)=c(2x+3y) a joint probability mass function over the five points with x=0,1,2 and y=0,1,

Tell me how you got the it use the figures to answer questions 1and 2. in each diagram, line k is parallel to line l, and line t intersects lines. 1. based on the diagrams, what is the value of x? 2. how would you verify your answer for x?

The ratio pv to nrt is plotted against pressure for ch4 at 0°c and 200°c. why does the curve for 0°c drop below the horizontal line for an ideal gas whereas the curve for 200°c does not?

What is sin 7x/4 ? i need on this urgent trig