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olga_2 [115]
2 years ago
12

Using only the numbers 4 through 12, fill in the circles so that the numbers on each straight line add up to 21

Mathematics
1 answer:
dangina [55]2 years ago
3 0

Answer:

This was fun if you have anymore of these feel free to message me on here if you need help

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Watermelons cost $0.35 per pound. Joseph’s watermelon costs between $4.20 and $5.25. Which compound inequality correctly represe
Ahat [919]
Working is attached :)

4 0
3 years ago
I need help please on this math
Zigmanuir [339]

Answer:

a

Step-by-step explanation:

3 0
3 years ago
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A box contain 12 balls in which 4 are white 3 are blue and 5 are red.3 balls are drawn at random from the box.find the chance th
Anastasy [175]

Answer:

3/11

Step-by-step explanation:

From the above question, we have the following information

Total number of balls = 12

Number of white balls = 4

Number of blue balls = 3

Number of red balls = 5

We solve this question using combination formula

C(n, r) = nCr = n!/r!(n - r)!

We are told that 3 balls are drawn out at random.

The chance/probability of drawing out 3 balls = 12C3 = 12!/3! × (12 - 3)! = 12!/3! × 9!

= 12 × 11 × 10 × 9 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1/(3 × 2 × 1) × (9 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1)

= 220 ways

The chance of selecting 3 balls at random = 220

To find the chance that all the three balls are selected,

= [Chance of selecting (white ball) × Chance of selecting(blue ball) × Chance of selecting(red balls)]/ The chance/probability of drawing out 3 balls

Chance of selecting (white ball)= 4C1

Chance of selecting(blue ball) = 3C1 Chance of selecting(red balls) = 5C1

Hence,

= [4C1 × 3C1 × 5C1]/ 220

= 60/220

= 6/22

= 3/11

The chance that all three are selected is = 3/11

4 0
3 years ago
Need help , don’t understand !!
mixer [17]

Quadratic Formula is (-b ±√(b²-4ac))/2a

With that being said:

y=2x²-5x-1 is in the correct form of ax²+bx+c

Now just plug in:

5±√(25-4(2 x-1))

5± √25+8

(5±√33)/2(2)

Answer is D

100% Sure


Brainliest?

5 0
3 years ago
What is the discriminant of 9x2 + 2 = 10x?<br> –356 <br> –172 <br> 28<br> 72
Airida [17]

Answer:

<h2><em>C. 28</em></h2>

Step-by-step explanation:

7 0
3 years ago
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