Mat question please help me

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

Given: circle o, cd is diameter, chord ab || cd. arc ab = 74°, find arc ca.

Jane is cooking beans and rice for dinner tonight. she has 4 cans of black beans, 6 cans of red beans, and 3 cans of garbanzo beans in her cupboard. if she grabs a can of beans without looking at the label, what is the probability of her making black beans and rice for dinner?