3 years ago

Which number added to 38 will result in a sum of 0?

Mathematics

2 answers:

Aloiza [94]3 years ago

8 0

Answer:

-38

Step-by-step explanation:

38 - 38 = 0

vovangra [49]3 years ago

5 0

Answer:

-38

Step-by-step explanation:

38 + -38

when adding a negative to the positive, you eliminate the plus sign.

38-38

you get 0

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..vertex: (4, -1)<br> f(3) = -6

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Answer:

$\huge\boxed{f(x)=-5(x-4)^2-1=-5x^2+40x-81}$

Step-by-step explanation:

The vertex form of an equation of a parabola:

$f(x)=a(x-h)^2+k$

$(h;\ k)$ - vertex

We have

vertex $(4;\ -1)\to h=4;\ k=-1$

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Therefore we have:

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Substitute $x=3$ and $f(3)=-6$

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Finally:

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