2. Solve the system by substitution. (1 point) 2x - y + z = -4
z = 5
-2x + 3y - 2 = -10
(-8,7,5)
O(-8, – 7,5)
(8, -7,5)
(-8, -7,-5)

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.

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?

Use the distance formula to find the distance between (-3,5) and (3,1)