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professor190 [17]
4 years ago
11

If the length of a rectangle is equal to triple the width. Which system of equations can be used to find the dimensions of the r

ectangle if the perimeter is 86 centimeters?
Mathematics
1 answer:
Luba_88 [7]4 years ago
5 0
If the length is 3×width then length+width=4×width and the perimeter is 8×width=86, width=86/8=43/4=10.75cm.
The length is 3×10.75=32.25cm.
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Zarrin [17]

Answer:

The air weight in a room is 49.69 kg.

Step-by-step explanation:

It is given that the room is 4.2m long, 3.5m wide, and 2.6m high. It is also given that 10 m³ of air weigh 13 kg.

The formula to find the volume of cuboid is,

V=l\times b\times h

V=4.2\times 3.5\times 2.6

V=38.22

The volume of room is 38.22 m³.

Since it is given that, 10 m³ of air weigh 13 kg. So,

1 m^3=\frac{13}{10}kg

1 m^3=1.3kg

So the air weight in the room is,

\text{Air weight}=1.3\times 38.22

\text{Air weight}=49.686\approx 49.69

Therefore the air weight in a room is 49.69 kg.

5 0
3 years ago
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alexira [117]

Answer:

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Step-by-step explanation:

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8 0
4 years ago
Rosemary buys 5 pounds of ground meat for $16.45. How much would 3 pounds of meat cost at the same rate?
cricket20 [7]

Answer:

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Step-by-step explanation:

first, find the cost per pound:

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7 0
3 years ago
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Step-by-step explanation:

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4 years ago
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