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umka2103 [35]
3 years ago
12

Solve x^2-8x=20 by completing the square. Which is the solition set of the equation ? A){-22, 14} B){-14, 22} C){-10, 2} D){-2,

10}
Mathematics
1 answer:
kozerog [31]3 years ago
3 0

Answer:

Its D. (-2 , 10)

Step-by-step explanation:

x^2 - 8x = 20

(x - 4)^2 - 16 = 20

(x - 4)^2 = 36

x - 4 = +/- 6

x = 6 + 4 or - 6 + 4

so x =  -2,  10.

Hope this helps.

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Find the distance between the pair of points. Round your answer to the nearest hundredth. (-8,19) and (3,5)
Amiraneli [1.4K]

Answer:

<h3>The answer is 17.80 units</h3>

Step-by-step explanation:

The distance between two points can be found by using the formula

d =  \sqrt{ ({x1 - x2})^{2} +  ({y1 - y2})^{2}  } \\

where

(x1 , y1) and (x2 , y2) are the points

From the question the points are

(-8,19) and (3,5)

The distance between them is

d =  \sqrt{ ({ - 8 - 3})^{2}  +  ({1 9 - 5})^{2} }  \\  =  \sqrt{( { - 11})^{2}  +  {14}^{2} }  \\  =  \sqrt{121 + 196}  \\  =  \sqrt{317}  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \\  = 17.804493...

We have the final answer as

<h3>17.80 units to the nearest hundredth</h3>

Hope this helps you

5 0
3 years ago
Given the equation 6/x=3/k+2, and the constraints x ≠ 0 and k ≠-2, what is x in terms of k?
Veronika [31]

Answer:

A) 2k+4

Step-by-step explanation:

To solve for terms of x, we need to. she sure that x is on its own side while every other term is on the other side.

To start, we will cross multiply. If we have a/b=c/d, then ad=bc

We can perform the same calculation here,

6/x=3/(k+2)

6(k+2)=3x

Divide both sides by 3

2(k+2)=x

x=2k+4

7 0
4 years ago
The hardcover version of a book weighs twice as much as its paperback version. The hardcover book and the paperback together wei
HACTEHA [7]

Answer:

The 4th system (h = 4.2 − p ; h = 2p)

Step-by-step explanation:

3 0
3 years ago
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Can you pls help me
SashulF [63]
I answered the last post, the third option is correct
7 0
3 years ago
PlEaSe HeLp LiNK aTtAcHeD...
ValentinkaMS [17]

Answer: B


Step-by-step explanation:

The shorter arrow is the hour while the longer arrow is the minutes. Since the shorter arrow is between one and two, the hour would be one. The clock goes by minutes, and each of the dashes are a minute. There are 60 dashes for 60 minutes. From 12 to 1, it's 5 minutes. It's the same for 1 to 2, 2 to 3, and so on. So 7 × 5 is 35 + 4 is 39, where the longer arrow is placed. So the time is 1:39.

8 0
3 years ago
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