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horsena [70]
3 years ago
15

Factoriza 4x²-y²-6y-9

Mathematics
2 answers:
Assoli18 [71]3 years ago
6 0
=4x²-(y²+6y+9)
=(2x)²-(y+3)²
=(2x+y+3)*(2x-y-3)
sveta [45]3 years ago
4 0
4 x^{2} -y^{2} -6y-9 \\ 4 x^{2} = y^{2} +6y+9 \\ 4 x^{2} =(y+3)(y+3) \\  \sqrt{ 4x^{2} } = \sqrt{(y+3)(y+3)} =\\2x=y+3\\2x-3=y

y=2x-3
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Elysia added -218+(-395) and got a sum of -613.Which best explains whether or not Elysia sum is reasonable?​
Thepotemich [5.8K]

Answer:

I don't know your options, but it is reasonable.

Step-by-step explanation:

Adding a negative is equivalent to subtracting a positive, so you would get

-218-395

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7 0
4 years ago
The ordered pairs (1, 1), (2, 8), (3, 27), (4, 64), and (5, 125) represent a function. What is a rule that represents this funct
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The functions would be:

D. y=x³

We can check it out.

(1,1); x=1; y=1 ⇒1=(1)³=1*1*1=1
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8 0
3 years ago
The two lines graphed below are not parallel. How many solutions are there to
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Step-by-step explanation:

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3 years ago
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topjm [15]
Total time (1 2/3 hours) minus the time spent stretching (1/4 hour) minus the time spent showering (1/3 hour) equals the time spent running.

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x= 1 2/3 - (1/4 + 1/3)
change 1 2/3 to improper fraction
x= 5/3 - (1/4 + 1/3)
need to multiply by a common factor
3 and 4 go into 12 evenly
5/3= 20/12
1/4= 3/12
1/3= 4/12

x= 20/12 - (3/12 + 4/12)
x= 20/12 - 7/12
x= 13/12
change back to mixed fraction

x= 1 1/12 hours spent running

Hope this helps!  :)
5 0
4 years ago
What is the circumference of this circle?
Illusion [34]

Answer:

C=2πr

Step-by-step explanation:

I need to see the circle, but this is the formula, you plug the radius into r and solve:)

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