It's likely you're not allowed to marry an inanimate object no matter what your age is :)
It is always safe to dispose of food that has expired, that is, passed the "use by" date printed on the package. But in common usage, most home cooks would not be concerned about the safety of a year-old brownie mix, as long as the box and inner plastic bag are not damaged.
No.
With parental permission a 17 year old can marry.
Yes, a 40 year old woman can marry a 25 year old man. There have been many women that are older marry a younger man.
No, 11yo are not allowed to marry.
In most places in the world an 16 year old can marry a 20 year old. But it will require parental permission to do so.
An 18 year old girl can marry an 18 year old boy even if they are not in love in this state.
In the USA an 18-year-old is a legal adult.... so yes, a 19 year old can marry whoever they want.
You can marry, but ONLY with parental consent.
Yeah
No, in most places, a 16-year-old cannot legally marry an 18-year-old without parental consent or a court order.
No person in their right mind will marry a 13 or 14 year old.