Which operation should you perform after (9 + 6) in the expression 122 + 10 × 2 − (9 + 6) ÷ 5?

What is the ratio of the length of an object in yards to the length of the same object in miles?

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?

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.