The change in temperature is +30ºC. The way I got this is that to get from -17ºC, I have to add that same number to get 0 - +17ºC. Now, I add +13, to get +13ºC. Hence, the change in temperature is +30ºC. Expression: (-17) + (+30) = (+13)

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.

Ahiker stands at an unknown elevation before he ascends 2 miles up a mountain to an elevation of 9 miles. find the elevation of the hiker before his ascent.

Extra points! find the missing dimension! need asap