Ayudenme plis, toy muy baga pa pensar :)

Measures of the angle of r, 31 s (x+4) t (3x+9)

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

Determine which postulate or theorem can be used to prove that lmn =nmo