800 hm = cm me i relay cant find out the answer

Find the value of x for which abcd must be a parallelogram -9-6x x-30

Dexter read 11 science fiction books and 5 history books. lena read 9 science fiction books and 4 history books. compare the students’ ratios of science fiction books to history books. 1. determine the ratios’ form:    science fiction books to history books 2. write the ratios as fractions:    dexter: 115; lena: 94 3. rewrite with a common denominator. 4. compare. 5. answer the question. determine which shows the correct comparison of the ratios for this problem.

F(x) = 1/x g(x)=x-4 can you evaluate (g*f)(0) ? why or why not?