Calcular las edades de Marcos, Betiana y Sabrina sabiendo que la edad de Sabrina es un tercio de la edad de Betiana más Marcos. La edad de Betiana más la de Sabrina es igual a la edad de Marcos menos 18 y entre los tres suman 72 años.

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk

step-by-step explanation:

assume that you have 3 different side lengths.   apply the pythagorean theorem here:   square each of the two shortest sides; call them a and b, so that their squares are a² and b².   also square the longest side, calling the result c².

now, if a² + b² = c² is true, the triangle is a right triangle; otherwise it is not a right triangle.

answer:

idk

step-by-step explanation: