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3 years ago

What is the maximum or minimum value of the function of f(x)=x^2-3

Mathematics

1 answer:

Alexandra [31]3 years ago

4 0

(0,-3) ................

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On a test Denzel answers that 3x + 6a + 7 is equivalent to 3(x + 2a +7). Is Denzel correct, why or why not? * Yes, he is correct

emmainna [20.7K]

Answer:

No, he is not correct because the constant in his answer should have been 21 not 7.

Step-by-step explanation:

$3(x+2a+7)=3x+6a+21$

Therefore, the correct answer is the fourth; he should have put 21.

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3 years ago

Can somebody help me? Thanks!

ICE Princess25 [194]

Answer: both our A

Step-by-step explanation:

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3 years ago

A 22-foot ladder is leaning up against the side of a house. The ladder makes an angle of 77o with the ground. How far up the sid

Crank

Answer:

21.44 ft

Step-by-step explanation:

(sketch to understand)

use SOH/CAH/TOA rules to solve

sin rule is used

solve for x

(working in the picture attached)

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2 years ago

According to the "January theory," if the stock market is up for the month of January, it will be up for the year. If it is down

PSYCHO15rus [73]

Answer:

The required probability is 0.031918.

Step-by-step explanation:

Consider the provided information.

It is given that According to an article in The Wall Street Journal, this theory held for 22 out of the last 34 years.

Therefore n=34

The probability it is either up or down is 0.5.

Thus the value of p =0.5 and q = 0.5

Now calculate the probability

Let X is the number of years that theory held.

X has a binomial distribution with n=34 and p=0.5

$P(X=22)=\binom{34}{22}(0.5)^{22}(0.5)^{12}\\P(X=22)=\frac{34!}{22!\times 12!}(0.5)^{22}(0.5)^{12}\\P(X=22)=548354040\times 5.8207660913\times 10^{11}\\P(X=22)=0.0319184060208\\P(X=22)\approx0.031918$

Hence, the required probability is 0.031918.

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3 years ago

As a company manager for claimstat corporation there is a 0.40 probability that you will be promoted this year. there is a 0.72

Charra [1.4K]

Suppose $P$ denotes the event of getting promoted and $R$ the event of getting a raise. Then

$\mathbb P(P\cup R)=\mathbb P(P)+\mathbb P(R)-\mathbb P(P\cap R)$
$\implies0.72=0.40+\mathbb P(R)-0.25$
$\implies\mathbb P(R)=0.57$

Now it sounds like you're asked to find $\mathbb P(R\mid P)$ , which the definition of conditional probability says is equivalent to

$\mathbb P(R\mid P)=\dfrac{\mathbb P(R\cap P)}{\mathbb P(P)}=\dfrac{0.25}{0.40}=0.625$

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3 years ago