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3 years ago

I neeeddddfd helpppppppppp

Mathematics

2 answers:

erica [24]3 years ago

7 0

Answer: A 4/16

Step-by-step explanation:

4/16 = 1/4

5/20 = 1/4

Luden [163]3 years ago

5 0

A because the other ones aren't equivalent.

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Find the missing coefficients <br><br><br>y=ax^2-10x+c <br>vertex :(-5,20)

Citrus2011 [14]

Remember, for $y=ax^2+bx+c$ the x value of the vertex is $\frac{-b}{2a}$

so
given
x value of vertex is -5
and
$y=ax^2-10x+c$
$\frac{-b}{2a}=\frac{-(-10)}{2a}=\frac{10}{2a}=$
$\frac{5}{a}=-5$
multiply both sides by a
5=-5a
divvide both sides by -5
-1=a
a=-1

$y=-1x^2-10x+c$
comlete the square
remember if we do
$y=a(x-h)^2+k$ (h,k) is the vertex
I know, we can subsitute the known values of te vertex
-5 for h and 20 for k then expand

$y=-1(x-(-5))^2+20$
$y=-1(x+5)^2+20$
$y=-1(x^2+10x+25)+20$
$y=-1x^2-10x-25+20$
$y=-1x^2-10x-5$

a=-1
c=-5

5 0

3 years ago

How to simplify radical expressions

Veseljchak [2.6K]

Hey there!

To simplify radical expressions, refer to the conversion of a radical expression to a number with an exponent:

$\sqrt[a]{x} = x^{\frac{1}{a} }$

Remember that if you don't see an index, there is an implied "2" that will go where "a" is.

Depending on your problem, you could also cancel a radical by raising the entire expression by the second power (only if your index is 2).

Hope this helped you out! :-)

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3 years ago

Please simplify this expression

ale4655 [162]

It’s 4R+7

:)))))))))))))))))))

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3 years ago

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NeX [460]

Answer:

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3 years ago

4 times a number cubed

sergij07 [2.7K]

Answer:

(4n)^3

Step-by-step explanation:

Let n = number

4 times a number

Cubed

(4n)^3

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4 years ago