Let X be the amount of 90% alloy and Y be the amount of 70% alloy. The equations are: x + y = 60 0.9x + 0.7y = 0.85 * 60 By substituting, we have: 0.9x + 0.7(60 - x) = 0.85 * 60 This simplifies to: (0.9 - 0.7)x = (0.85 - 0.7)*60 Solving for x yields: x = (0.85 - 0.7)*60/(0.9 - 0.7) x = 45 ounces For Y, we find: y = 60 - 45 y = 15 ounces
¡Hola! Bienvenido a!
Vamos a sumar cuántas canicas tenemos en total.
12+11+17+5=45
Queremos hallar la probabilidad de elegir una canica que no sea azul. Observemos cuántas canicas no son azules.
12+11+5=28
Tendremos esta probabilidad sobre 48.
28/48
Al simplificar, obtenemos 7/12 o alrededor de 58.33%.
¡Espero que esto ayude!
The least number of times that two planes can cross is zero, since parallel planes do not intersect. A good example would be a floor and a ceiling, which run parallel, hence they do not meet. Conversely, if two planes occupy the same space, they can intersect at infinitely many points, as could happen with a line within that plane.
For the equation Z^5=-7776i, we deduce that Z=+6.
