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telo118 [61]
4 years ago
14

one number is equal to two times a second number. two times the first number plus two times the second number is 24. if you let

x stand for the first number and y for the secoond, what are the two numbers?
Mathematics
1 answer:
ziro4ka [17]4 years ago
5 0
X = 2y
2x + 2y = 24
So if x = 2y that means 2x = 4y. Which means that 2x + 2y = 24 can be written as 4y + 2y = 24. Simplified to 6y = 24. Now we need to get 1y so we divide both sides by 6, 6y/6 = y and 24/6 = 4. so y = 4. so x= 2y can be written as x = 8.
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Answer:

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3 years ago
An open box is made from a 20 cm x 3 cm piece of tin by cutting a square from each corner and folding up the edges. The area of
Marta_Voda [28]

Answer:

Length of the final sides: 6 cm and 16 cm

Step-by-step explanation:

The lengths of the sides of the original box are

L=20 cm\\W=10 cm

Later, a piece of tin is cut out from each corner; the piece cut out has the shape of the square: we can call the length of its generic side x. Therefore, the dimensions of the box will now be:

L'=L-2x\\W'=W-2x

We also know that the area is

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And the area can be written as product of length and width, therefore:

A=L'W'

So we find:

A=(L-2x)(W-2x)\\96=(20-2x)(10-2x)

Solving for x,

96=200-20x-40x+4x^2\\4x^2-60x+104=0\\\\x^2-15x-26=0

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x = 13 cm (this is larger than the initial length of the width, therefore we discard it)

x = 2 cm

So, the length of the new sides are

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7 0
3 years ago
The number of a certain bacteria doubles in a lab culture every day. suppose there are 100 bacteria to start an experiment. writ
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<span>The population of a bacteria culture doubles every 2 minutes. Approximately how many minutes will it take for the population to grow from 1,000 to 500,000 bacteria
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Is not quite that. 
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<span>min 4 - 4000=1000*2^2; </span>
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Be careful! It doubles every 2 minutes.

So, 1,000*2^x=500,000
2^x=500. It asks you to approx. You know that 2^9=512, so x=9.
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</span>hope it's perfect!

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4 years ago
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Answer:

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5 0
3 years ago
Answer quick please if fast and correct i will give the brainly thingy
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Step-by-step explanation:

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6 0
3 years ago
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