Answer:
1260 is the correct answer
remember multiply them :)
Step-by-step explanation:
sub
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since -x^2+x+19=y
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x=-x^2+x+19+80
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x=-x^2+x+99
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0=-x^2+99
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x^2=99
x=3√11
x=y+80
3√11=y+80
minus 80 both sides
-80+3√11=y
x=3√11
y=-80+3√11
solution
(x,y)
(3√11,-80+3√11)
10.5 or 10 1/2 basically ten and a half
The answer to the equation can be easily solved with division. You take the total amount and divide it by the number of sold units
$234 / 18 = y
Answer:
postcodes
Step-by-step explanation:
Think of the post code as a combination lock
[?] [?] [?] [?] [?] [?]
If letters a numbers are allowed, each character can be A-Z and 0-9.
There are 26 letters, and 10 different digits
26 + 10 = 36 characters
Each block (I illustrated above) can be any of the 36 characters
If you have 2 blocks, you have a combination of
36 x 36 characters — which is the same as 
With 3 blocks: 
and so forth...
If your post code is made of 6 'blocks' it can be any combination of
