Simplify -0 for me please I need help on math homework thanks also is this long enough for you

An angle that measures between 90 and 180° is called a(,

How many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.) how many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.)

X=4 / y=100 if x=10 then what is y=?