Answer:
1/3
Step-by-step explanation:
There are 18 cookies divided by 3 friends so each friend gets 6 cookies.
If n is the number of cans in row r
n = 9 - r where r is a natural number less than 9
When r = 5 then n = 9 - 5 = 4
(you could let r = 9 as the ninth row has zero cans but values above 9 will give negative counts)
C
There is no way a equation will give you the same answer with different numbers (especially if the answer isn't zero, in this case it is 3)
hope this helps
<h3>
<u>answer</u><u>:</u></h3>
-0.7
<h3>
<em><u>steps</u></em><em><u>:</u></em></h3>
the quadratic formula is

substitute the correct values in

where it says +- you would type this into your calculator with + AND THEN - to get two separate answers.
when you type + you get the answer of: 5.701562119...
when you type - you get the answer of:
-0.7015621187...
when you round to the nearest tenth you get -0.7
<em>hope</em><em> </em><em>this</em><em> </em><em>helps</em><em>!</em><em> </em><em>:</em><em>)</em>
<em>have</em><em> </em><em>a</em><em> </em><em>great</em><em> </em><em>day</em><em> </em><em>~</em><em> </em><em>•</em><em>lipika</em><em>•</em>