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matrenka [14]
3 years ago
13

______ +15%=480 What is ______

Mathematics
1 answer:
Oksana_A [137]3 years ago
4 0

Answer:

479.85

Step-by-step explanation:

1 Simplify  15%  to  0.15.

x+0.15=480

2 Subtract 0.15 from both sides.

x=480-0.15

3 Simplify  480-0.15  to  479.85479.85.

x=479.85

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Answer:

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Step-by-step explanation:

length of a side of an  equilateral triangle is x

The perimeter is

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P = 3x

1/2 of the perimeter

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4 0
3 years ago
The probability density function of the time it takes a hematology cell counter to complete a test on a blood sample is f(x)=0.0
uysha [10]

Answer:

a) 20%

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c) Mean = 62.5 seconds; Variance = 52.083 seconds

Step-by-step explanation:

The time it takes a hematology cell counter to complete a test on a blood sample is continuously distributed over the period of 50 to 75 seconds with probability f(x) = 0.04.

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M=\frac{A+B}{2}=\frac{50+75}{2}\\ M= 62.5\ seconds\\\\V=\frac{(B-A)^2}{12}=\frac{(75-50)^2}{12}\\  V= 52.083\ seconds

Mean = 62.5 seconds.

Variance = 52.083 seconds.

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