Step 1: 80z + 2,000 + 40 Step 2: 80z + 2,040 Where did she make a mistake

Mathematics

1 answer:

mihalych1998 [28]3 years ago

7 0

No, she did the right way!!!!!

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Step-by-step explanation:

We need to find the perimeter of the rectangular blanket in this case because a border is being sewn onto the blanket. The perimeter of a rectangle can be calculated by multiplying the sum of the rectangle's length and width by 2. As an algebraic expression, that would be $2(l+w)$ , where $l$ is the rectangle's length and $w$ is the rectangle's width. We are given that $l=70$ and $w=40$ . Therefore, $2(70+40)=2*110=220$ cm of ribbon will be needed. Hope this helps!