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diamong [38]
3 years ago
11

The length of a rectangle is 3 yd more than twice the width, and the area of the rectangle is 35 yd2

Mathematics
1 answer:
rewona [7]3 years ago
4 0
The width of the rectangle = x.
The length of the rectangle is 3 yd more than twice the width = 2x+3.
The area is 35 yd².

The area is the width times the length.
35=x(2x+3) \\
35=2x^2+3x \\
0=2x^2+3x-35 \\
0=2x^2+10x-7x-35 \\
0=2x(x+5)-7(x+5) \\
0=(2x-7)(x+5) \\
2x-7=0 \ \lor \ x+5=0 \\
2x=7 \ \lor \ x=-5 \\
x=\frac{7}{2} \ \lor \ x=-5

The length and width must be positive so x=\frac{7}{2}=3.5.
2x+3=2 \times \frac{7}{2} + 3=7+3=10

The dimension of the rectangle are 3.5 yd and 10 yd.
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