15x+30(24-x)& lt； =540, x > is obtained; = 12, because x
2. If the grass species X Ridge, Grass and West * * * can make a profit of Y yuan, then Y =1.6 * 50x+1.1*160 * (24-x) =-96x+4224. Because k =-96
* stands for multiplication symbol,
A./kloc-What courses can a 0/5-month-old baby attend?
You can take enlightenment courses and music courses.
B. How old is the baby-friendly early ed