Need help with these proofs asap i have a 58 in geometry cuz of proofs ;c

It is given that the quadratic equation hx²-3x+k=0, where h and k are constants, has roots [tex] \beta \: and \: 2 \beta [/tex]express h in terms of k

What is the interquartile range of this data set? 2, 5, 9, 11, 18, 30, 42, 48, 55, 73, 81

Edger needs 6 cookies and 2 brownies for every 4 plates how many cookies and brownies does he need for 10 plates