Good evening.
This is a
incomplete quadratic equation, because it does not have the term
bx. Therefore, we can solve this faster with the following strategy:

Add
16 to both sides:

Take the square root:

Therefore:
number 9 =al you have to do is one and 7 eighths =9 so your sum will be 10 and 7 eighths.
hope this helps;)
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The answer is 21.52 so I hope that helped
Since the 1/4 of each pizza left :
Which means that :
Pizza 1 = 1/4 pizza Left
Pizza 2 = 1/4 pizza Left
i think there is no error in what's ben saying