Ali corrió tres décimos km antes de ir a la escuela después de regresar de la escuela corrió un quinto de km cuánto corrió Ali de distancia ​

Sheila conducts an investigation to see how the amount of salt dissolved in water affects the density of the water whichstatement best describes the correct plan for her procedure? the density and the amount of water are controls, and the amount of salt and the type of salt are variablesthe amount of water and the amount of salt are controls, and the type of salt and the density are variablesthe type of salt and the amount of water are controls, and the amount of salt and the density are variablesthe type of salt and the density of water are controls, and the amount of salt and the amount of water are variableso

The teacher didn't explain this at all and i don't understand this

Fill in the blanks of the conversation of the correct form of the verb ser: luis y yo . a luis le gusta comer mucha carne. cree que la sabrosa. yo creo que los pescados y la carne . ¿y tú persona que come verduras o te gusta más comer carne? ¿crees que la o que ?