To use the elimination method, you can add the two equations in a system of equations to eliminate one of the variables. Add the two equations.
{−9x+y=1010x−y=−9

What is the resulting equation?
Answers :

A 0+2y=10 plus 2 y is equal to 1

B x+0=1x plus 0 is equal to 1

C x+0=19x plus 0 is equal to 19

D 19x+2y=19

What is the prime factorization of 230

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 figures below are made out of circles, semicircles, quarter circles, and a square. find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations).