Evaluate the expression when a=
and c=
-2c+a
write your answer in simplest form ​

Ineed with 14, 16, 28 and 36 me. we didn't go over them in class so i don't know what to do.

If lmn=xyz, which congruences are true by cpctc? check all that apply

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.