Mario tiene 12 manzanas y 4 peras. Si se selecciona una al azar, ¿Cuál es la probabilidad de que esta sea una manzana?

One of the same side angles of two parallel lines is 20° smaller than the other one. find the measures of these two angles.

If the speed of an electromagnetic wave is 100,000 cm/s and its wavelength is 100 cm, what is its frequency? a) 100,000 cycles per second (hz) b) 1 × 10-3 cycles per second (hz) c) 10,000,000 cycles per second (hz) d) 1,000 cycles per second (hz)

Which of the following is the result of expanding the series