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rewona [7]
3 years ago
11

Find the value of k for x^2 - 2kx+7k -12=0 so that they have two equal roots

Mathematics
1 answer:
Alisiya [41]3 years ago
5 0

Step-by-step explanation:

x^2 -2kx +7k -12 = 0

two equal roots -->Δ = b^2 -4ac = 4k^2 - 4(7k-12)=0 = 4(k^2 - 7k +12)=4(k-4)(k-3)=0

so k =3 and k =4

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Find the missing length indicated
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Answer:

x = 240

Step-by-step explanation:

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x = \sqrt{57600} = 240

7 0
3 years ago
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Suppose you wanted to make an open-topped box out of a flat piece of cardboard that is 25 inches long
grigory [225]

i dont know man

Step-by-step explanation:

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Table:
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Answer:

2) Yes, each x-coordinate is only used once.

3) {1,2,3,4}

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Step-by-step explanation:

A relation is a function if there is no more than one y-value assigned to an x.

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You that here.

(1,25)

(2,45)

(3,60)

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The domain is the x-coordinate of each pair (the first of each pair):

{1,2,3,4}.

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One ordered pair that I see in the table is (3,60). There are 3 others you can choose and I named them above.

{(4,10),(3,15),(1,5),(2,25),(4,25)} is not a function because there are more than one pairs with the same x-coordinate,4.  

3 0
3 years ago
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Answer:

See below

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5 0
2 years ago
3. Which one doesn't belong? Give a reason why each square does not belong.
defon

Answer:

C. 8%

Step-by-step explanation:

Because everyone can get divided by 5 equally besides 8

6 0
3 years ago
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