1/9
Here's the proper explanation:
Since the vertex is (2,-1), the original equation will look like this: y=a*(x-2)^2-1
When the substitution happens we get to this:
0=a*(5-2)^2-1 then 1=a*(5-2)^2 -> 1=a*9
So, a=1/9! Written in another form:
1/9x^2-4/9x+4/9-1
Hope could help :)
The answer is 11, because 165 divided by 15 is 11 :)
The answer is <span>The sum is 10 · 11.
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The first 10 positive even numbers are:
2, 4, 6, 8, 10, 12, 14, 16, 18, 20
Their sum is:
2 + 4 + 6 + 8 + 10 + 12 + 14 + 16 + 18 + 20 = 110
Now, let's present it as two factors:
110 = 11 * 10