Hugh sold 4 cars during a 5 hour shift, and later sold 12 cars sold during a 15 hour shift. Determine whether these relationships are proportional. Explain your reasoning.
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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.

The ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry

If the diagram polygon abcd is a reflection across ef to make polygon a'b'c'd'.