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3 years ago

Subtract these fractions: 2/3 - 5/8

Mathematics

2 answers:

monitta3 years ago

8 0

Answer:

1/24 ; 0.04166667

Step-by-step explanation:

2 5

/ - / = 5*3 / 8*3 = 16/24 - 15/24 = 16-15/24 = 1/24

3 8

Sav [38]3 years ago

6 0

Answer:

1/24 ; 0.04166667

Step-by-step explanation:

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2 years ago

What is the solution to this equation 10x-15x+5=-45+20

nataly862011 [7]

Answer:

Step-by-step explanation:

$10x - 15x + 5 = - 45 + 20$

Collect like terms

$- 5x + 5 = - 45 + 20$

Calculate the sum

$- 5x + 5 = - 25$

Move constant to RHS and change its sign

$- 5x = - 25 - 5$

Calculate

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Divide both sides of the equation by -5

$\frac{ - 5x}{ - 5} = \frac{ - 30}{ - 5}$

Calculate

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Hope this helps...

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3 years ago

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2 years ago

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Simplify the expression below. 5xy2 - 3x + 2y2 + 7x + 13xy2

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2 years ago

A survey of 25 randomly selected customers found the ages shown (in years). The mean is 32.64 years and the standard deviation i

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Answer:

See below for answers and explanations

Step-by-step explanation:

Assuming that conditions have been met for the interval, we use the formula $\displaystyle CI=\bar{x}\pm t\frac{s}{\sqrt{n}}$ where $\bar{x}$ represents the sample mean, $t$ represents the critical value, $s$ represents the sample standard deviation, and $n$ is the sample size.

The critical value of $t$ for an 80% confidence level with degrees of freedom $df=n-1=25-1=24$ is equivalent to $t=1.317836$

Thus, we can compute the confidence interval:

$\displaystyle CI=\bar{x}\pm t\frac{s}{\sqrt{n}}\\\\CI=32.64\pm1.317836\biggr(\frac{9.39}{\sqrt{25}}\biggr)\\\\CI\approx\{30.17,35.11\}$

Therefore, we are 80% confident that the true mean age of all customers is between 30.17 and 35.11 years.

The margin of error is $\displaystyle t\frac{s}{\sqrt{n}}=1.317836\biggr(\frac{9.39}{\sqrt{25}}\biggr)\approx2.47$

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2 years ago