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BlackZzzverrR [31]
3 years ago
12

Find the student’s error in solving the following inequality.

Mathematics
2 answers:
Vera_Pavlovna [14]3 years ago
5 0
Hello,
Answer C

When you divide by a negative number the order is invert. (< become >")
Svetradugi [14.3K]3 years ago
4 0

Answer: c. The student should have switched the direction of the inequality sign to get –5> x for a final answer.

Step-by-step explanation:

From the given steps, the last step is done wrong by student.

When we multiply or divide any negative number on vboth sided of the inequality, the sign of inequality reverse its direction .

In the last step student divide the inequality by -5 but didn't switch direction of the inequality sign.

hence, c is the right option "The student should have switched the direction of the inequality sign to get –5> x for a final answer."

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elena-14-01-66 [18.8K]

Answer:

x > -1 or x < -1

Step-by-step explanation:

For the first equation, 5x-29 > -3

Step 1: Move the constant to the right and change its sign

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5x > -34+29

Step 2: Calculate the sum

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Step 3: Divide both sides of the inequality by <em>5</em>

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<em><u>Answer</u></em><em><u>:</u></em> -1

For the second equation, 2x+31 < 29

Step 1: Move constant to the right and change its sign

2x+31 < 29

2x < 29-31

Step 2: Calculate the difference

2x < 29-31

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Step 3: Divide both sides of the inequality by 2

2x < -2

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6 0
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9^2 + 12^2 = 225. the square root of 225 is 15. x=15
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