Ummm does anybody know what this means ??

Find the missing factor. 7s2 + 25s + 12 = (s + 3)( ).

What is the simplified form of 400x100 ? o 200x10 o 200x50 0 20x10 • 20x50

Eiko is wearing a magic ring that increases the power of her healing spell by 30%30\%30%30, percent. without the ring, her healing spell restores health points. which of the following expressions could represent how many health points the spell restores when eiko is wearing the magic ring?