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3 years ago

Question 21 is probably the hardest question on this homework

Mathematics

2 answers:

Snezhnost [94]3 years ago

7 0

-15+5x= 20

5x= 35
x= 7

20= -15+5x

35= 5x

7 = x

Degger [83]3 years ago

5 0

Answer:

20= -15+5x

35= 5x

7 = x

Step-by-step explanation:

I hope I can help you :)

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An organization has members who possess IQs in the top 4% of the population. If IQs are normally distributed, with a mean of 100

murzikaleks [220]

Answer:

The minimum IQ score will be "126".

Step-by-step explanation:

The given values are:

Mean

$\mu = 100$

Standard deviation

$\sigma=15$

Now,

⇒ $P(z>x)=4 \ percent \ i.e., 0.04$

⇒ $P(z>\frac{x- \mu}{\sigma} )=0.04$

⇒ $1-P(z \leq \frac{x-100}{15})=0.04$

⇒ $\frac{x-100}{15}=z0.96$

$=NORMDIS(z=0.96)$

$=1.751$

⇒ $x=100+15\times 1.751$

$=126.265 \ i.e., 126$

7 0

3 years ago

A dart is tossed and hits the dart board shown. The dart is equally likely to land on any

stiks02 [169]

It would be 4.9%, hope this helps :)

5 0

2 years ago

Jane bought an item for $40 that, after seeing it had a 20% discount. janes friend said the original price was $48. is she right

ale4655 [162]

Jane's friend is wrong, the original price would be $200

6 0

3 years ago

Researchers have discovered a new genetic marker for a form of cancer. Twelve percent of the overall population carry this marke

In-s [12.5K]

Answer:

The probability that a person with the marker develops cancer is 0.0725.

Step-by-step explanation:

Let's denote the events as follows:

<em>A</em> = a person has cancer

<em>B</em> = a person carries the marker.

<u>Given:</u>

P (A) = 0.03

P (B) = 0.12

P (B|A) = 0.29

The conditional probability of an event <em>X</em> provided that another event <em>Y</em> has already occurred is:

$P(X|Y)=\frac{P(Y|X)P(X)}{P(Y)}$

Use the conditional probability formula to compute the probability that a person with the marker develops cancer.

$P(A|B)=\frac{P(B|A)P(A)}{P(B)} =\frac{0.29\times0.03}{0.12}=0.0725$

Thus, the probability that a person with the marker develops cancer is 0.0725.

3 0

3 years ago

Solve by factoring g^2-14s+45=0

Andrej [43]

<h3>♫ - - - - - - - - - - - - - - - ~Hello There!~ - - - - - - - - - - - - - - - ♫</h3>

➷ First find two values that multiply to make 45 but add to make -14

As you will figure out through trial and error, it is -9 and -5

Factorize it with these values:

(g - 9)(g - 5)

The actual values for g would be the opposite of what is in the parenthesis

Therefore, g = 9, or g = 5

➶ Hope This Helps You!

➶ Good Luck (:

➶ Have A Great Day ^-^

↬ ʜᴀɴɴᴀʜ ♡

3 0

3 years ago