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andreev551 [17]
3 years ago
10

What is the line segment of DB

Mathematics
2 answers:
iVinArrow [24]3 years ago
7 0
The answer to this question should be c)48 united

-BARSIC- [3]3 years ago
6 0
48 units! This may be wrong but hoped it helped!

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What is the y value of the vertex of the function f(x)=-(x-3)(x+11)
AnnyKZ [126]

Answer:

49

Step-by-step explanation:

Because there is a minus sign infront of x-3, we can convert x-3 into the negative form:

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Which gives us:

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Now expand the brackets with the formula:

(a + b)(c + d) = ac + ad + bc + bd

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The formula for finding the x coordinate of a vertex in a quadratic equation is:

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Plug known variables in:

x = \frac{-(-8)}{2(-1)}

x = \frac{8}{-2}

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Now, to find the y coordinate, plug this variable back into the quadratic equation:

-x² - 8x + 33

y = -(-4^2) - (32) + 33\\y = -16 + 32 + 33\\\\

y = 49

So the y coordinate of the vertex is 49.

Hope this helps!

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3 years ago
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Answer:

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