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irga5000 [103]
2 years ago
9

Please help asap. 55 points

Mathematics
2 answers:
telo118 [61]2 years ago
8 0
k^2+kf-2f^2
=k^2+kf-f^2-f^2
=k^2-f^2+kf-f^2
=(k+f)(k-f)+f(k-f)
=(k+2f)(k-f)
B
atroni [7]2 years ago
5 0
The answer would be B. Using the foil method to check, the two k's equal k^2, then the k and -f would equal -fk, plus the 2fk would equal a positive fk. Lastly, the 2f and -f would equal -2f^2.
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While conducting experiments, a marine biologist selects water depths from a uniformly distributed collection that vary between
aleksandr82 [10.1K]

Answer:

The probability that a randomly selected depth is between 2.25 m and 5.00 m is 0.55.

Step-by-step explanation:

Let the random variable <em>X</em> denote the water depths.

As the variable water depths is continuous variable, the random variable <em>X</em> follows a continuous Uniform distribution with parameters <em>a</em> = 2.00 m and <em>b</em> = 7.00 m.

The probability density function of <em>X</em> is:

f_{X}(x)=\frac{1}{b-a};\ a

Compute the probability that a randomly selected depth is between 2.25 m and 5.00 m as follows:

P(2.25

                               =\frac{1}{5.00}\int\limits^{5.00}_{2.25} {1} \, dx\\\\=0.20\times [x]^{5.00}_{2.25} \\\\=0.20\times (5.00-2.25)\\\\=0.55

Thus, the probability that a randomly selected depth is between 2.25 m and 5.00 m is 0.55.

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3 years ago
How do I write an equation in standard form?
Aleks04 [339]
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5 0
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Anton unpacks 4 dozen glasses from a box. he finds 5/12 of the glasses are broken. how many glasses are broken?
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Which of the following points is the solution of the quadratic equation:3x^2-5x-2=0​
Maslowich

Answer:

x1 = 2

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Step-by-step explanation:

3x^2-5x-2=0

D=25-4*(-2)*3 = 25 + 24 = 49 --> sqrt 49 = 7

x1 = 5 + 7 / 2*3 =   2

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