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3 years ago

What is the value of x? Do not round the answer.

Mathematics

1 answer:

inysia [295]3 years ago

6 0

Answer:

Step-by-step explanation:

By definition, CD is an angle bisector. What that does is creates proportionality between the sides of each respective triangle. Here's the proportion:

$\frac{4}{3} =\frac{7.5}{x}$

Cross multiply to get 4x = 22.5 and

x = 5.625

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16 students are percussionist which is 20% of the students how many students are in band

11Alexandr11 [23.1K]

Answer:

80 Students are in the band class

Step-by-step explanation:

I did this mentally so sorry if it is bad

16 = 20%

= 40% 32 students

40% +40% = 80%

32+ 32 = 64

80+20%

64+16

80 Students are in the band class

5 0

3 years ago

They are arranged randomly because manual typewriters tended to jam if the user typed too fast - therefore the arrangement was i

solmaris [256]

Answer:

Huh

Step-by-step explanation:

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3 years ago

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If X = 4 units, Y = 3 units, and Z = 10 units, then what is the volume of the triangular pyramid shown above?

Levart [38]

Answer:

Step-by-step explanation:

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2 years ago

Question 4 options: Find the mean and standard deviation for a binomial distribution with 680 trials and a probability of succes

lys-0071 [83]

Answer:

Mean for a binomial distribution = 374

Standard deviation for a binomial distribution = 12.97

Step-by-step explanation:

We are given a binomial distribution with 680 trials and a probability of success of 0.55.

The above situation can be represented through Binomial distribution;

$P(X=r) = \binom{n}{r}p^{r} (1-p)^{n-r} ; x = 0,1,2,3,.....$

where, n = number of trials (samples) taken = 680 trials

r = number of success

p = probability of success which in our question is 0.55

So, it means X ~ $Binom(n=680, p=0.55)$

Now, we have to find the mean and standard deviation of the given binomial distribution.

Mean of Binomial Distribution is given by;

E(X) = n $\times$ p

So, E(X) = 680 $\times$ 0.55 = 374

Standard deviation of Binomial Distribution is given by;

S.D.(X) = $\sqrt{n \times p \times (1-p)}$

= $\sqrt{680 \times 0.55 \times (1-0.55)}$

= $\sqrt{680 \times 0.55 \times 0.45}$ = 12.97

Therefore, Mean and standard deviation for binomial distribution is 374 and 12.97 respectively.

3 0

3 years ago

Is one third rational or irrational

Zinaida [17]

One third is a rational number....since it can be written in p/q form(1/3)

5 0

3 years ago

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