Find x, y, and z. If necessary, round to the tenths place.
A X = 23, y = 44.5, z = 116
B. X = 23, y = 89, z = 116
C. X = 44.5, y = 44.5, Z = 116
D. X = 66, y = 89, z = 116

Can someone explain the elimination method to me for this problem?

Kylie explained that (-4x+9)^2 will result in a difference of squares because (-4x+9)^2 (-4x+9)^2 =(-4x)^2+(9)^2=16x^2+81

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.