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lana66690 [7]
3 years ago
10

Marion flipped a coin three times. What is the probability that exactly two heads appeared?

Mathematics
1 answer:
Readme [11.4K]3 years ago
7 0
Probability of getting heads: 1/2 

Probability to get 2 heads out of three tries is: 1/8
Work: 1/2 x 1/2 x 1/2 = 1/8
You might be interested in
12. Write the first five terms of two different sequences that have 10 as the
kodGreya [7K]

Answer:

a)  The arithmetic sequence with common difference 2 that has 8 as the first term.

b) The arithmetic sequence of common difference -5 and first term 15.

Step-by-step explanation:

Let's use for example the arithmetic sequence with common difference 2 that has 8 as the first term. Then the first two terms of this sequence are:

8, and (8+2) = 10 Therefore the second term is 10.

Another arithmetic sequence of common difference -5 and first term 15. The firs two terms of this sequence are:

15, and  (15 - 5)  = 10. Therefore again a 10 as second term.

6 0
3 years ago
Please help me, im desperate
Arada [10]

Answer: C. “BEC”

Step-by-step explanation:

5 0
2 years ago
Find the difference. (5x 2 - 3x + 7) - (3x 2 + 4x - 5)
GREYUIT [131]
If you simplify this expression you get 2x 2 -7x -2

3 0
3 years ago
2x+3y=1, -x+2y=-4 solve using substitution method
ollegr [7]

Step-by-step explanation:

1) 2x+3y-3y=1-3y. -x+2y= -4

2x/2=1-3y/2. -(1-3y/2)=-4

x=1-3y/2. -1+3y/2= -4

x=1-3(-2)/2 3y/2= -4+1

x=1+6/2 3y/2×2/3= -3×2/3

x=7/2 y= -2

S.s{ 7/3,-2}

2). -4x-6y+6y=7-6y. 4x+y= -2

-4x/-4=7-6y/-4. 4(-7-6y/4)+y= -2

x= -7-6y/4. -7-6y+y = -2

x= -7-6/4 -5y/5= 5/5

x=-13/4 y= 1

S.s { -13/4, 1 }

8 0
3 years ago
Number 3?? I can’t figure it out
monitta

divide the total cost by the number of hinges:

Mark's hardware: $28 / 8 = $3.50 per hinge

Steve's Supply: $39 /  11 = $3.45 per hinge.


$3.45 is less than $3.50, so the answer would be C.

7 0
3 years ago
Read 2 more answers
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