2 years ago

I don't understand this question can someone help me with this please, please explain!!

Mathematics

1 answer:

Salsk061 [2.6K]2 years ago

5 0

Answer:

13.5%

Step-by-step explanation:

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Answer:

Step-by-step explanation:

Since triangles ABC and CDB are similar, CD and CB is the same as the ratio between CB and CA. 15:9=x:15. x=25. Subtracting CD to just be left with AD, we get 25-9=16, or answer choice D. Hope this helps!

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3 years ago

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Delicious77 [7]

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Write 1.48 repeating as a mixed number as a mixed number

andrew-mc [135]

$1.48=1+0.48=1+\dfrac{48}{100}=1+\dfrac{48:4}{100:4}=1+\dfrac{12}{25}=\boxed{1\frac{12}{25}}$

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2 years ago

Rewrite the quadratic function in vertex form. Y=3x^2-12x+4

chubhunter [2.5K]

Answer:

$\large\boxed{y=3(x-2)^2-8}$

Step-by-step explanation:

The vertex form of an equation of a parabola y = ax² + bx + c:

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

(h, k) - vertex

$h=\dfrac{-b}{2a},\ k=f(h)$

We have the equation:

$y=3x^2-12x+4\\\\a=3,\ b=-12,\ c=4$

Substitute:

$h=\dfrac{-(-12)}{2(3)}=\dfrac{12}{6}=2\\\\k=f(2)=3(2^2)-12(2)+4=3(4)-24+4=12-24+4=-8$

Finally:

$y=3(x-2)^2+(-8)=3(x-2)^2-8$

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2 years ago