Question

Analyze Osvaldo’s work to determine where he made an error and what his error was.In step 1, he had to add 2w to both sides.In step 1, he had to divide both sides by 2w .In step 2, he had to divide both sides by 2.In step 2, he had to subtract 2 from both sides.

Answer 1

Analysing Osvaldo's work, he should be dividing by 2 in step 2 and not multiplying.

The given equation : p = 2l + 2w

Let's review Osvaldo's steps in making l the subject ;

1.) Subtract 2w to both sides :

p - 2w = 2l + 2w - 2w

p - 2w = 2l

This step is right in other to isolate 2l

2.) Multiply by 2

(p - 2w) × 2  = 2l × 2

2p - 4w = 4l

This step is wrong because it doesn't allow Osvaldo to isolate l

The appropriate step Osvaldo should have taken is a o Divide by 2 in step 2 ;

(p - 2w) / 2  = 2l /2

l = (p - 2w) / 2

Therefore, In step 2, Osvaldo is meant to divide

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Answer 2

Answer:

Short answer its c.  In step 2, he had to divide both sides by 2.

Step-by-step explanation: