what do u think the dum. est way to break ur hand is also HELP IN PIC also comment u think is the dum. est way to u

What is the length of the unknown leg in the right triangle ?

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

Afarmer sells 9.5 kilograms of apples and pears at the farmer's market. 4/5 of the weight is the apples and the rest is the pears. how many kilograms of pears did she sell at the farmers market