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user100 [1]
3 years ago
6

The length of a rectangle is 9 inches and its perimeter is 48 inches. What is the width of the rectangle?

Mathematics
2 answers:
lana [24]3 years ago
6 0
A.) Equation of Perimeter of a rectangle (P) = 2(l + w)

48 = 2(9 + x)

B.) Solving: 48 = 2(9 + x)

48 = 18 + 2x

2x = 48 - 18

x = 30/2

x = 15

In short, Width would be: 15 inches

Hope this helps!
gulaghasi [49]3 years ago
5 0
9(2) + 2x = 48
18 + 2x = 48
2x = 30
x = 15
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8. A company makes electronic components for TV's. 95% pass final inspection (and 5% fail and need to be fixed). 120 components
Taya2010 [7]

Using the binomial distribution, it is found that the variance of the number that pass inspection in one day is 5.7.

For each component, there are only two possible outcomes, either it passes inspection, or it does not. The probability of a component passing inspections is independent of any other component, hence, the binomial distribution is used to solve this question.

Binomial probability distribution

Probability of <u>exactly x successes on n repeated trials, with p probability</u>, and has variance given by:

V(X) = np(1 - p)

In this problem:

  • 95% pass final inspection, hence p = 0.95
  • 120 components are inspected in one day, hence n = 120.

The variance is given by:

V(X) = np(1 - p) = 120(0.95)(0.05) = 5.7

The variance of the number that pass inspection in one day is 5.7.

To learn more about the binomial distribution, you can take a look at brainly.com/question/24863377

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2 years ago
Does a plane have a definite beginning and end?
Lorico [155]
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5 0
3 years ago
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Step-by-step explanation:

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4 0
3 years ago
Find the equation of this line. y= [?]x+[?]
DochEvi [55]

Answer:

y=3x-4

Step-by-step explanation:

Hi there!

Slope-intercept form: y=mx+b where <em>m</em> is the slope and <em>b</em> is the y-intercept (the value of y when x=0)

<u>1) Determine the slope (</u><u><em>m</em></u><u>)</u>

m=\displaystyle\frac{y_2-y_1}{x_2-x_1} where two points that fall on the line are (x_1,y_1) and (x_2,y_2)

On the graph, two points are highlighted for us: (0,-4) and (2,2). Plug these into the formula:

m=\displaystyle\frac{2-(-4)}{2-0}\\\\m=\displaystyle\frac{2+4}{2}\\\\m=\displaystyle\frac{6}{2}\\\\m=3

Therefore, the slope of the line is 3. Plug this into y=mx+b:

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<u>2) Determine the y-intercept (</u><u><em>b</em></u><u>)</u>

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Recall that the y-intercept occurs when x=0. Given the point (0,-4), the y-intercept is therefore -4. Plug this into y=3x+b:

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I hope this helps!

5 0
2 years ago
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