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IgorLugansk [536]
3 years ago
13

Solve for (x-4)^2=13

Mathematics
2 answers:
ryzh [129]3 years ago
8 0
(x-4)^2=13 
First take the square root of both sides. 
x-4= \sqrt{13}, - \sqrt{13}. There are two solutions because a square root comes with a positive and negative solution.
Now move the 4 over by adding 4 on both sides. 
x= \sqrt{13}+4, - \sqrt{13} +4

Norma-Jean [14]3 years ago
6 0
                         (x - 4)² = 13
                 (x - 4)(x - 4) = 13
          x(x - 4) - 4(x - 4) = 13
x(x) - x(4) - 4(x) + 4(4) = 13
          x² - 4x - 4x + 16 = 13
                 x² - 8x + 16 = 13
                             - 13  - 13
                    x² - 8x + 3 = 0
                    x = -(-8) ± √((-8)² - 4(1)(3))
                                        2(1)
                    x = 8 ± √(64 - 12)
                                    2
                    x = 8 ± √(52)
                                2
                    x = 8 ± 2√(13)
                                 2
                    x = 4 ± √(13)
                    x = 4 + √(13)    or    x = 4 - √(13)
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Answer:

Derrick mistakenly combined the numbers adding it together but the numbers are not the same value to be combined. You cannot add yards and ft together.

Width = 55ft

Area = 4950 sq ft

Cost = $9900

Step-by-step explanation:

Derrick mistakenly combined the numbers adding it together but the numbers are not the same value to be combined. You cannot add yards and ft together.

You have to convert the yards to ft to add it to the other ft.

1 Yard = 3 ft

So the width is  18 yards 1 ft = 54ft + 1ft = 55ft

To calculate the  area is L x W

The length is 30 yards. Convert that to ft = 90ft

So 90 x 55 = 4950 sq ft

At $2 per sq ft, you multiply the 4950 sq ft by $2

2 x 4950 = $9900

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3 years ago
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Tasya [4]

Step-by-step

=> 900=-100x+300

=> -100x+300=900

=> -100x=900–300

=> -100x=600 divide both side by -100

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3 0
3 years ago
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For a field trip 9 students rode in cars and the rest filled three busses. How many students were in each bus if 99 students wer
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4 years ago
Which value of P and Q result in an equation with no solutions? 83x+P=83x+Q
alekssr [168]

There is no number I can think of that would make the statement untrue.

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Unless you know differently, the equation says that P must equal Q no matter what x is. If there is such a condition, it is not obvious.

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VMariaS [17]

Answer:

x = 2, -3

Step-by-step explanation:

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Note: The options given are incorrect.

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