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krek1111 [17]
3 years ago
15

Which expressions are equivalent to the one below? Check all that apply.

Mathematics
1 answer:
Aleksandr [31]3 years ago
5 0

Answer:

D

Step-by-step explanation:

(5·5)*x = 25*x =25^x

the rest are wrong

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Where does the energy stored in coal originally come from?
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Answer:

C . The sun

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2 years ago
What is the focus of the parabola? <img src="https://tex.z-dn.net/?f=y%3D%20%5Cfrac%7B1%7D%7B4%7D%20x%5E%7B2%7D%20-x%2B3" id="Te
OlgaM077 [116]
We know that
the equation of the parabola is of the form
y=ax²+bx+c
in this problem
y=1/4x²−x+3
where
a=1/4
b=-1
c=3
 the coordinates of the focus are
(-b/2a,(1-D)/4a)
where D is the discriminant b²-4ac
D=(-1)²-4*(1/4)*3-----> D=1-3---> D=-2
therefore
x coordinate of the focus
-b/2a----> 1/[2*(-1/4)]----> 2

y coordinate of the focus
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the coordinates of the focus are (2,3)
3 0
3 years ago
Read 2 more answers
Lynn asked six friends how many cars their parents own. She recorded 1, 1, 2, 2, 2, and 4 cars.
Paladinen [302]

Answer:

D

Step-by-step explanation:

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3 years ago
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Which expression is equivalent to 4c + 7 -2C - 3?
Ivahew [28]
The answer is (A): 2c+4
4 0
2 years ago
Amanda, Bryan, and Carl are about to compete in 100
Sveta_85 [38]

9514 1404 393

Answer:

  6

Step-by-step explanation:

Any of the three can be in first place.

Any of the remaining two can be in 2nd place.

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7 0
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