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sweet [91]
3 years ago
15

the prices of three t-shirts are $24, $30, and $36 what is the probability of choosing a $24 t-shirt is 1/6. the probability of

choosing a $20 t-shirt is 1/2. The probability of choosing a $36 t-shirt is 1/3. what is the expected value of a t-shirt?
Mathematics
1 answer:
satela [25.4K]3 years ago
3 0

convert all to a common ratio

24 1/6

30 3/6

36 2/6

(24+30+30+30+36+36)/6

186/6

the expected value is 31.

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Find the molar mass in grams of <br> CaSO4 * 2H20<br> grams
adoni [48]

Answer:

172 g/mol

Step-by-step explanation:

CaSO4 . 2H2O

Atomic mass of

Ca = 40

S = 32

O = 16

H = 1

Molar mass = 40 + 32 + (16×4) + 2{(1×2)+16}

= 72 + 64 + 2(18)

= 136 + 36

= 172 g/mol

4 0
3 years ago
3x+5y=-3 x-5y=-5 show your work
frez [133]
We are given the equations 3x+5y=-3 and x-5y=-5.

Both equations have a 5y  term which allows us to easily solve the system by elimination. To do so we will add the equations together like a simple addition problem by adding the x terms together, the y terms together, and the integer answers together.

3x + 5y = -3
+x - 5y = -5
---------------
4x + 0y = -8

The y terms cancel out since one is positive and one is negative. Now we can solve for x.

4x = -8

\frac{4x}{(4)} = \frac{-8}{(4)}

x = -2

Now plug -2 in for x in one of the original equations to find y.

(-2) - 5y = -5

-5y = -3

y = 3/5

Our answer as an ordered pair is (2, 3/5)
6 0
3 years ago
Please help due tmr I also have 2 more questions!
Marina CMI [18]

Answer:

17

Step-by-step explanation:

n = 17

n - 7 = 10

Carry over the - 7

n = 7 + 10

n = 17

6 0
2 years ago
Based on 10,500 responses from 34,000 questionnaires sent to all its​ members, a major medical association estimated that the an
SIZIF [17.4K]

Answer:

d) Convenience

Step-by-step explanation:

According to my research on different types of sampling techniques, I can say that based on the information provided within the question the sampling technique used in this method is called a Convenience technique. This technique collects data from all the participants that were conveniently available to participate, and does not have any criteria that needs to be met. In this situation they used the data from all the participants that responded to the questionnaires, in other words the participants that were conveniently available,

I hope this answered your question. If you have any more questions feel free to ask away at Brainly.

5 0
3 years ago
Medal and Fan! Estimate an 18% tip for a $63.50 meal.
kherson [118]
The answer is <span>$11.43

you type 63.50 into your calculator
then divide it by 100
the times it by 18
and you get 11.43
that is the answer</span>
7 0
3 years ago
Read 2 more answers
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