Add 280.00 +21.40 +6.30 +.41 = 308.71, I don't know where the 7 was added though

Mathematics

1 answer:

Vitek1552 [10]3 years ago

8 0

I m getting 308.11, there is an additional 0.60 that is added, maybe your source is wrong, or there is a copying error.

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Step-by-step explanation:

So, since the beginning lengths of the square is x and x, the area of the square is x².

But then, you add 3 to one length, so that side is now (x+3), and then you add 4 to the width, so that is now (x+4).

Finally, you would multiply them together to get the equation you would use to find the new area.

For this, you would cross-multiply everything together; the x in the length by the x in the width, the x in the length by the 4 in the width, the 3 in the length by the x in the width, and then the 3 in the length by the 4 in the width. Now, all you have to do is add all of these together to get your answer.

Here's the work:

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