The answers X2 plus 4X -21This is because it’s possible
B) in a function, the output is allowed to be shared…
Less than does mean minus, but when the question says less than some number, that number goes first. should have written 5-n
Se nos dice que Lucía corre 4 millas diarias. Ya que no corre los días domingo, entonces corre 6 días por semana, por lo tanto:

Por lo tanto, Lucía corre 24 millas por semana.