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Mice21 [21]
3 years ago
7

Suppose x is a number such that 2x=x/2-6. Must it then be true that 3x=12. Explain your reasoning

Mathematics
2 answers:
KATRIN_1 [288]3 years ago
8 0
2x = x/2 - 6.....multiply both sides by 2
4x = x - 12
4x - x = -12
3x = -12
x = -12/3
x = -4

3x = 12......3(-4) = 12.....-12 = 12...false......so 3x = 12 is not true because x = -4



strojnjashka [21]3 years ago
6 0
2x = x/2 - 6
6 + 2x = x/2
8x = x/2
x^2 = 8/2
x^2 = 4
x^2 - 4 = 0
(x - 2) (x + 2) = 0
x = 2 and x = -2

False

This is the actual right answer :) a teacher saw this :)
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If ΔEFG ~ ΔLMN with a ratio of 2:1, which of the following is true?
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Step-by-step explanation:

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The sequence of letters in the triangle name tells you the corresponding segments:

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\huge\color{pink}\boxed{\colorbox{Black}{♔︎Answer♔︎}}

x = 2

<em>right</em><em> </em><em>option</em><em> </em><em>is</em><em> </em>(E).

Step-by-step explanation:

f(x) = x³ - 3x² + 12 in interval [-2, 4]

{taking f'(x) by doing derivative of f(x)}

f'(x) = 3x² - 6x

.•. f'(x) = 0

0 = 3x² - 6x

0 = 3x(x - 2)

0 = x - 2

x = 2

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