Dados los siguientes puntos de los vértices de un triangulo, determinar el tipo de triangulo. 1. A(-2,-1), B(2,2), y C(5,-2)
2. A(2,-2), B(-8,4) y C(5,3)
3. A(3,2), B(-2,-3) y C(0,-5)
4. A(22/3, 1/2), B(-3,-2) y C(-3, 3)

Determine the mean and variance of the random variable with the following probability mass function. f(x)=( 729divided by 91) (1 divided by 9) superscript x baseline comma x equals 1,2,3 round your answers to three decimal places (e. g. 98.765).

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

The interior angles formed by the side of a hexagon have measures of them up to 720° what is the measure of angle a