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Inessa05 [86]
3 years ago
5

A fair coin is tossed two times in succession. The set of equally likely outcomes is {HH, HT, TH, TT). Find the probability of g

etting exactly two heads.
The probability of getting two heads is
(Type an integer or a simplified fraction.)
Mathematics
1 answer:
Morgarella [4.7K]3 years ago
5 0

Answer:

1/4

Step-by-step explanation:

Two Heads = HH,

From four options one of them is HH,

So likely the answer is 1/4,

Hope this helps!

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Ben bought 8 fairy sodas and 5 fairy hotdogs and spent $30.75 fairy dollars. Holly bought 7 fairy sodas and 6 fairy hotdogs and
wlad13 [49]
Set up the system of equations:

8x + 5y = 30.75
7x + 6y = 33

We'll use elimination to solve this system of equations.

Take the coefficients for y in both problems. Multiply one of them by -1:

5 \times -1 = -5

Since this coefficient is taken from the first problem, we'll multiply the entire second problem by this negative coefficient:

(7x + 6y = 33) \times -5 = -35x - 30y = -165

Take the coefficient for y in the second problem and multiply the entire first problem by that coefficient:

(8x + 5y = 30.75) \times 6 = 48x + 30y = 184.50

Your system should now look like this:

48x + 30y = 184.50
-35x - 30y = -165

Combine these two equations to cancel out y:

13x = 19.50

Divide both sides by 5 to get x by itself:

x = 1.5

A fairy soda costs $1.50.

Because we know the value of one of the variables, we can plug it into one of the equations:

8(1.5) + 5y = 30.75
12 + 5y = 30.75

Subtract 12 from both sides:

5y = 18.75

Divide both sides by 5 to get y by itself:

y = 3.75

A fairy hotdog costs $3.75.
6 0
3 years ago
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there are 12 ducks and 15 gesse swimming in a pond. what is the ratio of gesse to total brids at the pond?
lana66690 [7]
 Best Answer:  15 (number of geese) : 27 (total # of birds)<span>
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3 0
2 years ago
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if the heart of an elephant , at rest beat an average of 1680 beats in 60 min . What is the rate in beats per minute
Tresset [83]
Use the rule of 3 simple 

1680 beats ------- 60 min.
x beats -------------- 1 min. 
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 x = (1680*1)/60 = 1680/60 = 168/6 = 28 beats per minute 

hope helped 
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3 years ago
X/x-3 times x-1/3-x​
Tema [17]

X-X^2/ (x-3)^2 try that I’m not 100% sure tho

8 0
3 years ago
Hoi i need this ✨AnsWeREd✨
antoniya [11.8K]

Answer:

answer above or below is right

Step-by-step explanation:

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3 years ago
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