What is the expression for f(x) when we rewrite 64x/4^5x-1 as 4^f(x) ?

Some boys and girls were asked if they had a pet. one third of the group were boys. there were 20 boys. 20% of the girls had a pet. boys with a pet : girls with a pet = 1 : 5 i need to know how many girls there are.

Twelve less than a number is at most 20

Aquadrilateral has exactly one pair of parallel sides. which name best describes the figure?