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Sladkaya [172]
3 years ago
8

A square can be changed into a rectangle by increasing the width by 3 units. Which expression represents the area of the rectang

le in square units? (A) x^2+8x+15 (B) x2+15 (C) 2x +8 (D) 2x+15
Mathematics
1 answer:
hjlf3 years ago
5 0
Letting x be the side-length of the square, the new rectangle has length x and width x+3.  Thus, the area is (x)(x+3)=x^2+3x.  This is not an answer choice.
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Answer:

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Step-by-step explanation:

Rule(s): a\frac{b}{c} = \frac{a \cdot c + b}{c}, \frac{-a}{b}=-\frac{a}{b}, \frac{\frac{a}{b}}{\frac{c}{d}}=\frac{a\cdot \:d}{b\cdot \:c} \\2\frac{2}{3}=\frac{2\cdot 3+2}{3}\\=\frac{8}{3}\\=\frac{-\frac{8}{3}}{\frac{4}{3}}\\=-\frac{\frac{8}{3}}{\frac{4}{3}}\\=\frac{-8\cdot \:3}{3\cdot \:4}\\= \frac{-24}{12}\\= -2

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pochemuha
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