Missing angle problems!!

just the answer to even 1 of them is appreciated

With these: 18/36 = 1/? missing number change 1 5/8 to improper fraction. change 19/5 to a mixed number.

Louis wants to carpet the rectangular floor of his basement.the basement has an area of 864 square feet.the width of the basement is 2/3 it's length. what is the length of louis's basement

Credit card a offers an introductory apr of 3.4% for the first three months and standard apr of 15.7% thereafter,