The combined area of the photo and mat needs to be 224 square inches. The equation that represents the combined area is (2w+8)(2
w+10)=224, where w represents the width of the mat around the photo.
1 answer:
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Answer:
<h3>Tomas added 6 to both sides of the equation instead of subtracting 6</h3>Step-by-step explanation:
Find the complete question in the comment section.
Given the equation 2x+6y=12 to represent the total cost, where x represents the number of pounds of granola and y represents the number of pounds of walnuts.
If he buys 3pounds of granola, and he need to get amount of walnut, he should have substituted x = 3 into the expression to get y as shown:
Comparing the calculation with Tomas's, we can see that Tomas added 6 to both sides of the equation on line 3 instead of subtracting 6 from both sides of the equation. This was Tomas first error.