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Foster’s answer to the question he wrote for Ranger was 7x + (–3), while Ranger’s answer was 7x – 3. They both checked their work by letting x = 5, and they both claim to be correct. Are they both correct? Explain.

Respuesta :

Answer:

Yes, they are both correct.

Step-by-step explanation:

Subtracting is the same as adding a negative number.

Ranger's answer was 7x-3; this is the same as 7x+(-3).  This means they are both correct.

fichoh

The first expression keeps the bracket and the second simplifies completely, hence, both equations are correct.

Given the expressions :

  • 7x + (-3) - - - - - - (1)
  • 7x - 3 - - - - - - - (2)

Substituting x = 5 in the expression to check if both expressions are the same :

7x + (-3) - - - - (1)

7(5) + (-3)

35 + (-3)

35 - 3 = 32

7x - 3 - - - - (2)

7(5) - 3

35 - 3 = 32

Yes, both equations are correct as they both give the same value when a value is substituted for x in the equations.

Learn more : https://brainly.com/question/10613585

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