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faust18 [17]
3 years ago
12

I HAVE BEEN STUCK ON THIS FOR DAYS HEEEELP THANK YOU STRAGERS =D

Mathematics
1 answer:
Gre4nikov [31]3 years ago
8 0
I think you can just divide 11 by 4 and you will get the answer to z.


Equation: z = 11/4

z = 2.75


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There are 10 pens in a box. There are x red pens in the box. All the other pens are blue. Jack takes at random two pens from the
expeople1 [14]

The probability that one of each color is selected is \frac{10x - x^2}{45}

<h3>Probabilities</h3>

The probability of an event is the chances of the said event

The given parameters are:

  • Total  = 10
  • Red = x
  • Blue = 10 - x

<h3>Calculating the required probability</h3>

The probability that one of each color is selected is calculated as follows:

P = P(Blue) \times P(Red) + P(Red) \times P(Blue)

So, we have:

P = \frac{10 - x}{10} \times \frac{x}{9} + \frac{x}{10} \times \frac{10 - x}{9}

This gives

P = \frac{x(10 - x)}{90} +\frac{x(10 - x)}{90}

Take LCM

P = \frac{2x(10 - x)}{90}

Simplify the above expression

P = \frac{x(10 - x)}{45}

Expand

P = \frac{10x - x^2}{45}

Hence, the probability that one of each color is selected is P = \frac{10x - x^2}{45}

Read more about probabilities at:

brainly.com/question/7965468

4 0
3 years ago
Evaluate the expression without using a calculator.<br> In1/e^7
Sati [7]

Answer:

-7

Step-by-step explanation:

ln(\frac{1}{e^7})\\=ln(e^{-7})\\  =-7ln(e)\\=-7

8 0
3 years ago
Which are the solutions of the quadratic equation? x2 = 9x + 6
Lelechka [254]
X^2 = 9x + 6
x^2 - 9x - 6 = 0
use quadratic formula : (-b (+-) sqrt b^2 - 4ac) / (2a)
a = 1, b = -9, c = -6
now we sub

x = (-(-9) (+-) sqrt -9^2 - 4(1)(-6)) / 2(1)
x = 9 (+-) sqrt 81 + 24)/2
x = 9 (+-) sqrt 105) / 2
x = 9/2 + 1/2 sqrt 105 or x = 9/2 - 1/2 sqrt 105

8 0
4 years ago
Read 2 more answers
The points (19,-2) and (0,0) fall on a particular line. What’s is it’s equation in slope intercept form?
Mice21 [21]

Answer:

y=-2/19x

Step-by-step explanation:

slope=(y1-y2)/(x1-x2)=-2/19

y-intercept=0

y=-2/19x+0

3 0
3 years ago
What was two. thirds and fifth twelve
Harrizon [31]
The answer is 1 and 1/12 because you have to have a common denomonator.
4 0
3 years ago
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