Which equation results from adding the equations in this system? x + 6 y = 9.
Negative x + 2 y = negative 15.

8 y = negative 6
8 y = 6
4 y = 24
4 y = negative 6

Se tiene en una caja de canicas 10, 4 blancas y 6 negras ¿cual es la probabilidad que en 2 extracciones con reemplazo sean blancas? ¿cual es la probalidad que en 2 extracciones sin reemplazo sean negras?

Ana earns 2.5% simple interest on $2,000 in her savings account. she does not make any deposits or withdrawals. after 3 years, how much interest will ana have earned on her savings account?

1/2+1/6-3/4 simplify the given expression leaving the answer in improper fraction form.