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3 years ago

Is the polynomial a difference of squares and if it is, factor the polynomialy^2 - 9

Mathematics

1 answer:

victus00 [196]3 years ago

5 0

Answer:

(x + 3)(x - 3).

Step-by-step explanation:

Yes, because both y^2 and 9 are perfect squares.

y^2 - 9

= (x + 3)(x - 3).

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the times it took for 35 loggerhead sea turtle eggs to hatch in a simple random sample are normally distributed, with a mean of

beks73 [17]

The number of days that the eggs took in hatching is 54 days.

Given that mean is 50, standard deviation is 2 and confidence level is 95% and sample size is 35.

We are required to find the number of days it took to hatch the eggs.

We have to apply the z statistics because sample size is greater than 30.

Z=(X-μ)/σ, in which μ is mean and σ is standard deviation.

Z score for the confidence level 95% is 1.96.

1.96=(X-50)/2

3.92=X-50

X=50+3.92

X=53.92

X=54 (After approximation)

Hence the number of days that the eggs took in hatching is 54 days.

Learn more about z statistics at brainly.com/question/25638875

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8 0

2 years ago

If the solutions of f(x)=0 are -1 and 2 then find the solutions of f(x/2)=0

olga2289 [7]

Answer: -2 and 4

Step-by-step explanation:

Let $t=x/2$ .

$f(t)=0 \longrightarrow t=-1, 2\\\\\therefore x=-2, 4$

5 0

2 years ago

Find the value of x

Leviafan [203]

No x’s have no value

4 0

3 years ago

Read 2 more answers

Plz help me well mark brainliest if correct!...

Karo-lina-s [1.5K]

Answer:

D 98 inches

Step-by-step explanation:

3 0

3 years ago

Can someone help me with this question?

belka [17]

Answer:

The required probability is 0.0155.

Step-by-step explanation:

We are given that the one-year survival rate for pancreatic cancer is 20%.

Of 12 people diagnosed with pancreatic cancer at one hospital, 6 survived one year.

The above situation can be represented through binomial distribution;

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

where, n = number of trials (samples) taken = 12 people

r = number of success = 6 survived

p = probability of success which in our question is probability of

one-year survival rate for pancreatic cancer, i.e; p = 20%

Let X = Number of people survived one year

So, X ~ Binom(n = 12 , p = 0.20)

Now, the probability that 6 survived one year is given by = P(X = 6)

P(X = 6) = $\binom{12}{6} \times 0.20^{6} \times (1-0.20)^{12-6}$

= $924 \times 0.20^{6} \times 0.80^{6}$

= 0.0155

5 0

4 years ago

Is the polynomial a difference of squares and if it is, factor the polynomialy^2 - 9​

Is the polynomial a difference of squares and if it is, factor the polynomialy^2 - 9