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arsen [322]
3 years ago
9

The perimeter of a rectangle is 30 cm the length is 9 cm long longer than the width what are the length and width of the rectang

le
Mathematics
1 answer:
adell [148]3 years ago
8 0

Step-by-step explanation:

perimeter = 2(length) + 2(width)

let x represent the width of the rectangle

30 = 2x + 2(x + 9)

30 = 4x + 18

12 = 4x

x = 3

therefore width = 3 cm

length = 3+9

= 12cm

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2 years ago
A cereal company is exploring new cylinder-shaped containers. Two possible containers are shown in the diagram.x is 6 and r=4.5
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Container \rm X will have less label area than container \rm Y by about 9\; \rm in.

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A rectangular sheet of paper can be rolled into a cylinder. Conversely, the lateral surface of a cylinder can be unrolled into a rectangle- without changing the area of that surface.

Indeed, the width of that rectangle will be the same as the height of the cylinder. On the other hand, the length of that rectangle should be exactly equal to the circumference of the circles on the top and the bottom of the cylinder. In other words, if a cylinder has a height of h and a radius of r at the top and the bottom, then its lateral surface can be unrolled into a rectangle of width h and length 2\,\pi\, r.

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3 years ago
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