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elena55 [62]
3 years ago
13

40,-20,10,-5,__,__,__ What are the next three numbers.

Mathematics
1 answer:
valkas [14]3 years ago
4 0

Answer:

2.5, -1.25, 0.625

Step-by-step explanation:

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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
Only using 1 2 3 4, find a solution that equals 18, 19, 20, and 21
adoni [48]

Answer:

See below, there may be more than one answer

Step-by-step explanation:

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(4+2)(3)+1 = 19

(1)(2+3)(4) = 20

(1+2)(3+4) = 21

6 0
3 years ago
What is the slope of a line that is parallel to the x-axis? m=
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Parallel to the x-axis and perpendicular to the y-axis: zero
Parallel to the y-axis and perpendicular to the x-axis: undefined
I hope that's right, that's how I remember it
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Five students divided 74 base ten rods equally among them. how many base ten rods were left over?
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1 rod was left over.
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