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Charra [1.4K]
3 years ago
9

Please help I’m struggling badly

Mathematics
1 answer:
Nady [450]3 years ago
4 0

Answer:

yea bro should be the first one

Step-by-step explanation:

since the ratio is 5.5/5 we could scale it up to 11/10 and so f times that should be the amount of f used for every b that this girl used

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Please help me with this question
Cloud [144]

Answer:

36

Step-by-step explanation:

split it into half, and you'll see that each rectangle when split into half has 2 triangles that are 12 ft, and now AECD is 3 lots of those 12 triangles that is 12 feet in area, therefore total would be 12 x 3 = 36

5 0
4 years ago
The number of vibrations n n per second of a nylon guitar string varies directly with the square root of the tension T T and inv
emmasim [6.3K]

Answer: T=40.96\ KgF

Step-by-step explanation:

We know that:

n: The number of vibrations per second of the nylon guitar string.

T: Tension.

L: The length of the string.

Since  n  varies directly with the square root of the  T and inversely with  L, the equation has the following form:

n=k*\frac{\sqrt{T} }{L}

Where "k" is the constant of variation.

Knowing that when n=15 and L=0.6, T=256, we can find the value of "k":

n=k*\frac{\sqrt{T} }{L}\\\\L*n=k\sqrt{T}\\\\\frac{L*n}{\sqrt{T}}=k\\\\k=\frac{(0.6)(15)}{\sqrt{256}}\\\\k=0.5625

Finally, in order to find the tension when the length is 0.3 meters and the number of vibrations is 12, you need to substitute these values and the value of "k" into n=k*\frac{\sqrt{T} }{L} and solve for T:

12=(0.5625)\frac{\sqrt{T} }{0.3}\\\\\frac{12(0.3)}{(0.5625)}=\sqrt{T}\\\\(6.4)^2=T\\\\T=40.96\ KgF

8 0
3 years ago
Miguel has a painting that is 4 inches wide by 2 feet long. He made an enlarged copy of it. The enlarged copy is 1 foot wide. Wh
ahrayia [7]

The length of the enlarged copy in feet is 2.7 feet.

<u>Step-by-step explanation</u>:

  • The painting is 4 inches wide and 2 feet long.
  • convert inches into feet (1 inch=0.083 foot). Therefore, 4 inches=0.3 feet
  • The enlarged copy is 1 foot wide and 'x' feet long.

The width is enlarged from 0.3 to 1 which is increased by 0.7 feet.

∴ The length should also be increased by 0.7 feet = 2+0.7 = 2.7 feet

8 0
3 years ago
Kuis [+50]: <br> Find the value of x in the equation 350x² - 2199x + 3454 = 0
lakkis [162]

Answer:

x= -3454

Or,

x= -3.58

Step-by-step explanation:

350x² - 2199x + 3454 = 0

350x² - 2199x = 0 - 3454

350x² - 2199x = -3454

x(350x - 2199) = -3454

Now,

Either ,

x=-3454

or,

350x-2199= -3454

350x= -3454+2199

350x= -1255

x= -1255/350

x= -3.58

5 0
3 years ago
Read 2 more answers
Which of the following statistics are unbiased estimators of population​ parameters? Choose the correct answer below. Select all
kiruha [24]

Answer:

B. Sample mean used to estimate a population mean.

C. Sample variance used to estimate a population variance.

D. Sample proportion used to estimate a population proportion.

Step-by-step explanation:

This is because the mean of the sampling distribution of the mean tends to target the population mean. Also, the mean of the sampling distribution of the variance tends to target the population variance.

This means that the sample mean and variance tend to target the population mean and variance, respectively, instead of systematically tending to underestimate or overestimate that value. This is why sample means and variances are good estimators of population means and variances, respectively. This is also true for proportions but not true for medians, ranges and standard deviations.

5 0
4 years ago
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