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MathematicsMathematics
6 April, 11:38

Which statement is true?

a. The equation - 3|2x + 1.2| = - 1 has no solution.

b. The equation 3.5|6x - 2| = 3.5 has one solution.

c. The equation 5|-3.1x + 6.9| = - 3.5 has two solutions.

d. The equation - 0.3|3 + 8x| = 0.9 has no solution.

+1
Answers (1)
  1. 6 April, 14:46
    0
    Hello,

    Answer C is the only exact affirmation

    1)

    if - 3.1x+6.9>0 then |-3.1x+6.9|=-3.1+6.9

    ==>5 (-3.1+6.9) = - 3.5

    ==>-15.5x+34.5=-3.5

    ==>x=76/31

    2)

    if - 3.1x+6.9<0 then |-3.1x+6.9|=3.1x-6.9

    ==>5 (3.1x-6.9) = - 3.5

    ==>15.5x-34.5=-3.5

    ==>x=2
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Home » Mathematics » Which statement is true? a. The equation - 3|2x + 1.2| = - 1 has no solution. b. The equation 3.5|6x - 2| = 3.5 has one solution. c. The equation 5|-3.1x + 6.9| = - 3.5 has two solutions. d. The equation - 0.3|3 + 8x| = 0.9 has no solution.
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