James is 19 years old he is three years older than twice his sister meredith's age write an equation that can be used to find meredith's age

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?

Can someone me with my math problem pls my teacher is on my back about this

The blue segment below is a diameter of o. what is the length of the radius of the circle?