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irina [24]
3 years ago
12

30 points. Answers are: A. 164 B. 391 C. 323 D. 238

Mathematics
2 answers:
VikaD [51]3 years ago
5 0
D.238 because the students who did not like Mexican food are in groups S, R, and T. If you add those together, you get 238
nekit [7.7K]3 years ago
5 0

You add all the sections that don't intersect with mexican food. sr,and t. For 238

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Solve<br> for x:<br> 3(1 - 3x) = 2(-4x + 7)
djverab [1.8K]

Answer:

x= -11

Step-by-step explanation:

distribute the 3 and the 2:   3 - 9x = -8x + 14

add 9x from both sides and subtract 14 from both sides:  -11 = x

x = -11

4 0
3 years ago
Dion flips a coin 20 times and records if it comes up heads. if getting heads is a success, what is the probability of a success
hram777 [196]

The probability of a success on each roll of the coin that is filipped by Dion is 0.5.

<h3>What is the probability?</h3>

Probability is the likelihood that a stated event would occur. The odds the event occurs is 1 and the odds that the event does not happen is 0. If a coin is flipped, there is 50% chance of getting either a head or a tail.

To learn more about probability, please check: brainly.com/question/13234031

#SPJ4

4 0
2 years ago
The mean number of daily surgeries at a local hospital is 6.2. Assume that surgeries are random, independent events. (a) The cou
Scilla [17]

Answer:

a) correct option is

Poisson distribution is 6.2 and standard deviation is 2.49

b) probability for only 2 or less than 2  surgeries  in a given day is 0.0536

Step-by-step explanation:

Given data:

mean number is given as 6.2

correct option is

Poisson distribution is 6.2 and standard deviation is 2.49

we know that variance is given as\sigma^2 = mean = 6.2

hence, standard deviation is given as \sqrt{6.2} = 2.48998

thus standard deviation is 2.49

correct option is

Poisson distribution is 6.2 and standard deviation is 2.49

b) probability for only 2 or less than 2  surgeries  in a given day is

P(X \leq 2) = P(X =0) + P(X =1) + P(X =2)

                 = \frac{e^{-6.2} 6.2^0}{0!} +\frac{e^{-6.2} 6.2^1}{1!} +\frac{e^{-6.2} 6.2^2}{2!}

                 = 0.002029 + 0.012582+ 0.039006

                 = 0.053617

                = 0.0536

7 0
3 years ago
What is 80 ÷ (-50)?
Harrizon [31]

Answer:

- 1.6

Step-by-step explanation:

If divide these to numbers without the negative, you'll get 1.6

Then you can add the negative sign to the 50 and 1.6 and you'll get the correct answer... btw I'm just lazy and that's my way of dividing negative numbers.

7 0
3 years ago
Find (f -9)x).<br> f(x) = -3x + 2<br> g(x)= x2
algol13

Answer:

29 and -18

Step-by-step explanation:

f(x)= -3x+12

f(-9)= -3(-9)+2

f(-9)= 27+2

f(-9)= 29

g(x)= x2

g(-9)= -9(2)

g(-9)= -18

7 0
4 years ago
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