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Misha Larkins [42]
2 years ago
12

Find the value of X to the nearest tenth

Mathematics
1 answer:
KonstantinChe [14]2 years ago
3 0

Answer:

it is 10 rounded hope it help

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Evaluate expression 15/x for x=3
irga5000 [103]

Answer:

x=5

Step-by-step explanation:

15÷5=3

that is the right answer

4 0
3 years ago
Read 2 more answers
Suppose that you randomly draw one card from a standard deck of 52 cards. After writing down which card was drawn, you replace t
34kurt

Answer:

The probability is 0.0775

The expected value is 4.75 clubs

The standard deviation is 1.8875 clubs

Step-by-step explanation:

The variable X follows a binomial distribution, because we have n identical and independent events (19 cards) with a probability p of success and 1-p of fail (there is a probability of 1/4 to be club and 3/4 to be diamond, heart or spade). Then, the probability that x of the n cards are club is:

P(x)=\frac{n!}{x!(n-x)!}*p^{x}*(1-p)^{n-x}\\P(x)=\frac{19!}{x!(19-x)!}*0.25^{x}*(0.75)^{19-x}

So, the probability P of drawing at least 8 clubs is:

P = P(8) + P(9) + P(10) + ... + P(18) + P(19)

Replacing, the values of x, from 8 to 19, on the equation above, we get:

P = 0.0775

Additionally, the expected value E(x) and standard deviationS(x) for this distribution is given by:

E(x)=np = 19(0.25) = 4.75

S(x)=\sqrt{np(1-p)} =\sqrt{19(0.25)(0.75)} =1.8875

8 0
3 years ago
Kay scored above 90% on five of her math quizzes, 80% to 90% on fourteen of them, and 70% to 80% on two of them. What is the exp
Leya [2.2K]
In total, Kay took 5+14+2=21exams. she got 80%-90% on 14 of them. the probably is 14/21 which is 2/3. Therefore, the probability of Kay getting 80%-90% on her next exam is 2/3 or 66.6%
3 0
3 years ago
A quadrilateral with four congruent angles (all 90 degrees) is called a
erastovalidia [21]

It's called a rectangle. This is just a definition, so there is not much to explain.

5 0
3 years ago
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Rudolph and the other reindeer are pulling Santa's sleigh that has a mass 1
finlep [7]

Answer:

it is 4.2 n

Step-by-step explanation:

because you have to divide 525/125=4.2

7 0
3 years ago
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