Which function has real zeros at x = 3 and x = 7?

Mathematics

2 answers:

Nezavi [6.7K]4 years ago

7 0

Answer:

x² - 10x + 21

Step-by-step explanation:

the 3rd one

(x-3)(x-7)=0

nydimaria [60]4 years ago

4 0

Answer:

C. f(x) = x2 – 10x + 21

Step-by-step explanation:

Just had this on a test

You might be interested in

Find the equation of the line.

ale4655 [162]

Answer:

y= -17x-120.

Step-by-step explanation:

1) according to the condition the lines are parallel. It means the slope of the required line is -17;

2) if to substitute the (-7;-1) into the equation y= -17x+i, then i= -120;

3) the required equation of the line is y= -17x-120.

6 0

2 years ago

Since 1851, exactly 119 hurricanes have hit Florida (this includes the years 1851 and 2019),—only direct hits by hurricanes are

alukav5142 [94]

Answer:

There is a 0.58% probability of Florida being struck by four or more hurricanes in the same year.

Step-by-step explanation:

Since we have only the mean during the interval, we can solve this problem using the Poisson probability distribution.

In a Poisson distribution, the probability that X represents the number of successes of a random variable is given by the following formula:

Poisson probability distribution

$P(X = x) = \frac{e^{-\mu}*\mu^{x}}{(x)!}$

In which

x is the number of sucesses

$e = 2.71828$ is the Euler number

$\mu$ is the mean in the given time interval.

In this problem, we have that:

Since 1851, exactly 119 hurricanes have hit Florida (this includes the years 1851 and 2019). Counting 1851 and 2019, there are 169 years in this interval. This means that $\mu = \frac{119}{169} = 0.704$

If the probability of hurricane strikes has remained the same since 1851, what is the probability of Florida being struck by four or more hurricanes in the same year?

This is $P(X \geq 4)$ .