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Igoryamba
3 years ago
14

Solve x^2 - 8x = 3 by completing the square. Which is the solution set of the equation?​

Mathematics
2 answers:
Alik [6]3 years ago
8 0

Answer:

A

Step-by-step explanation:

Given

x² - 8x = 3

To complete the square

add (half the coefficient of the x- term)² to both sides

x² + 2(- 4)x + 16 = 3 + 16

(x - 4)² = 19 ( take the square root of both sides )

x - 4 = ± \sqrt{19} ( add 4 to both sides )

x = 4 ± \sqrt{19}

Solution set is (4 - \sqrt{19}, 4 + \sqrt{19} )

sp2606 [1]3 years ago
5 0

1st one

Step-by-step explanation:

I have answered ur question

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Dan earns £9.70 per hour. How much will he earn for 5 hours work?
Mademuasel [1]

Answer:

48.50

Step-by-step explanation:

9.70 x 5

8 0
4 years ago
Read 2 more answers
HELP ASAP PLSSSSSSSSSSSS
ludmilkaskok [199]

Answer:

f = .39

Step-by-step explanation:

d (v) = 2.15 v^2 / (64.4 f)

v = 40

d = 138

substitute these in

138 = 2.15 (40)^2 / (64.4 *f)

simplify

138 = 2.15 (*1600) / (64.4 *f)

138 = 3440 / (64.4 *f)

multiply each side by 64.4f

138 * 64.4 f = 3440

8887.2 f = 3440

divide by 8887.2

8887.2 f /8887.2= 3440/8887.2

f=.38707

to the nearest hundredth

f = .39

8 0
3 years ago
Read 2 more answers
George spent 70 % of his saving to buy a camera. The camera cost $574 . How much did he originally have in savings?
madreJ [45]
I think the answer is as follows:

70/574 = x/100

574x=7000
574/7000 = .082
final answer is 820
820 x 70% = 574


6 0
4 years ago
Can someone tell me what the evaluated answer is?
Amiraneli [1.4K]

Answer:

16)  7⁻²

17) -1⁻²

Step-by-step explanation:

plug in the x=, y=, and n= into the equation.

4 0
3 years ago
Ed is 7 years older than Ted. Ed’s age is also 3/4 times Ted’s age. How old are Ed and Ted?
svetlana [45]
Let Ted be x.

Ed is 7 years older =  x  + 7

Ed = (3/4)Ted

(x + 7) = (3/4)x

x + 7 = 3x/4

x - 3x/4 = -7

x/4 = -7

x = -28,           Ted = -28 years.

(x + 7) = -28 + 7 = -21,      Ed = -21 years

Goodness. We had negative numbers for the ages, well does that make sense?  No it doesn't.

Our answer is correct. But the sense in the question is lacking. The question has been wrongly set.

<span>We might assume negative ages to mean before they came into the world, before birth! </span>
7 0
4 years ago
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