Can somebody help me please ​

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

Could somebody me with this radical simplification?

Someone answer asap for ! the following statements are true about the coins calvin and sasha have collected. * calvin and sasha has the same amount of money. * calvin has only quarters. * sasha has dimes, nickels, and pennies * calvin has the same number of quarters as sasha has dimes. * sasha has $1.95 in coins that are not dimes. exactly how many quarters does calvin have?