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GalinKa [24]
3 years ago
10

"assume x is a random variable with mean μ and standard deviation σ . find expressions for the mean and standard deviation of y

if this variable is determined by the expression y
Mathematics
1 answer:
Naddika [18.5K]3 years ago
7 0
The mean is (x+μ)/<span>σ</span> as determined by the Canaon-Heinlich equation.
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Ryan bought 6 apples and 9 peaches for a total of $7.86. Madi bought 4 apples and 5 peaches for $4.82.
sergey [27]
Let's call:
a = price of 1 apple
p = price of 1 peach

The total cost is the price of 1 apple times the number of apples plus the price of 1 peach times the number of peaches, therefore the system can be:
\left \{ {{6a + 9p = 7.86} \atop {4a + 5p = 4.82}} \right.

Solve for a in the second equation (you can choose to solve for any of the variables in any of the equations, try to understand what is the best):
a = (4.82 - 5p) / 4

Now, substitute in the first equation:
6 · (4.82 - 5p) / 4 + 9p = 7.86
7.23 - (15/2)p + 9p = 7.86
(3/2)p = 0.63
p = 0.42

Now, substitute this value in the formula found for a:
<span>a = (4.82 - 5·0.42) / 4</span>
   = 0.68

Therefore, one apple costs 0.68$ and one peach costs 0.42$.
6 0
3 years ago
6 / 32<br>Simplify<br>a)<br>4p + 2p – 3p<br>b)<br>9s- 5s + 2s-S<br>c)<br>8t + 3r - 76 - 9r​
Charra [1.4K]

Answer:

a.3p

b 5s

c 2r -76 this can be the answer

3 0
2 years ago
Read 2 more answers
NEED HELP EMERGENCY ‼️
cestrela7 [59]

Answer:

A. Reflect across the y-axis

Step-by-step explanation:

if the negative sign was outside the radical then it would've been a reflection on the x-axis.

6 0
3 years ago
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Hi i have this class work of my cousing
guajiro [1.7K]

Answer:

5 < 8

-4 < 0

0 < 4

-5 < 5

-9 > -19

-5 > -8

Step-by-step explanation:

Remember, the "Alligator" or better known as the "Packman" symbol (  >  <  )

It will always want to "eat" the bigger number. so, 8 is bigger than five, so the "Packman" will want to go after the bigger number. 5 < 8

6 0
3 years ago
Heber pays $40 each month to stream Disney+ on one device.
photoshop1234 [79]

Answer:

5

Step-by-step explanation:

take your price and subtract the monthly price

115-40=75

now you have the price of all your extra devices summed up

75÷15=5 extra devices

5 0
3 years ago
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