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USPshnik [31]
3 years ago
10

2. Twice a certain number is doubled. The resulting number is four times the original number.

Mathematics
1 answer:
Anna35 [415]3 years ago
8 0
2(2x)=4x
duh
4x=4x
x=x
true,
all real numbers are solutions
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<img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B11%7D%7B17%7D%20%20%5Cdiv%20%20%5Cfrac%7B7%7D%7B10%7D%20" id="TexFormula1" title=
Lilit [14]

Your answer is 110/119

11/17 Divided By 7/10

11 * 10

17 * 7

110/119

That number can't be simplified, so that is your final answer.

Best of luck,

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8 0
3 years ago
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3 years ago
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erma4kov [3.2K]

Answer:

Step-by-step explanation:

We would set up the hypothesis test. This is a test of a single population mean since we are dealing with mean

For the null hypothesis,

µ = 12

For the alternative hypothesis,

µ < 12

Since the population standard deviation is given, z score would be determined from the normal distribution table. The formula is

z = (x - µ)/(σ/√n)

Where

x = sample mean

µ = population mean

σ = population standard deviation

n = number of samples

From the information given,

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x = 8 minutes

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z = (8 - 12)/(12/√36) = - 4/2 = - 2

Test statistic = - 2

6 0
3 years ago
Jake is saving for a new tablet. It costs $250, and he has $100. He earns $5 per week for doing chores. Jake wants to figure out
kirza4 [7]

Answer: 250 ≤ 100+5x

150≤5x divide by 5

30≤x

It will take 30 weeks to earn enough.

Step-by-step explanation:

7 0
2 years ago
Multiply. Write your answer in simplest form.<br><br> 5/7 x 7/10
grandymaker [24]
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