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Rom4ik [11]
3 years ago
7

A^2 + 6ab for a=-3 and b=4

Mathematics
1 answer:
Marianna [84]3 years ago
3 0

Answer:

multiply a by 2 divide a and 3

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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%

b) 40%

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.

a) The percentage of tests require more than 70 seconds is:

P(X>70) = 1- \frac{70-50}{75-50} \\P(X>70) =0.2 = 20\%

b)The percentage of tests that require less than one minute (60 seconds) is:

P(X70) =0.4 = 40\%

c) The mean and variance of a continuous distribution are determined by:

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.

3 0
3 years ago
Which mixed number is equivalent to the improper fraction?<br> 21/9
algol13

Answer:

2 1/3

Step-by-step explanation:

5 0
3 years ago
During math class, Erik draws a circle with a compass. The circle has a radius of 3 inches. What is the circle's diameter?
sleet_krkn [62]

Answer: 6 inches

Step-by-step explanation:

The diameter is double the radius

3 0
3 years ago
Read 2 more answers
If g(x) = 3x^2+2x-1. Find g(-1).​
Mandarinka [93]

Step-by-step explanation:

g(x) = 3x² + 2x - 1

g(-1) = 3(-1)² + 2(-1) - 1

= 3(1) -2 -1

= 3 - 3

= 0

5 0
3 years ago
Solve - 1.2x + 2.5 = 0.8x + 6.5
lesantik [10]

Answer: x is -2

Steps:

- 1.2x + 2.5 =  0.8x + 6.5

- 1.2x - 0.8x = 6.5 - 2.5

- 2x = 4

x =  4/-2

x = - 2

Brainliest pls if I am correct!

6 0
2 years ago
Read 2 more answers
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