All categories

3 years ago

What is the discriminant of the polynomial below 9x^2-18x+9

Mathematics

1 answer:

Anika [276]3 years ago

4 0

Answer:

[ b2 - 4ac ]

Step-by-step explanation:

In any given expression, it's a number.

In this expression, the number is zero, indicating that

the expression is a square.

You might be interested in

35. In a simple random sample of 25 high school students, the sample mean of the SAT scores was 1450, and the sample variance wa

Tatiana [17]

Answer:

$1450-2.0\frac{30}{\sqrt{25}}=1450-12$

$1450+2.0\frac{30}{\sqrt{25}}=1450+12$

And the best option would be:

c. 1450 +/- 12

Step-by-step explanation:

Information provided

$\bar X=1450$ represent the sample mean for the SAT scores

$\mu$ population mean (variable of interest)

$s^2 = 900$ represent the sample variance given

n=25 represent the sample size

Solution

The confidence interval for the true mean is given by :

$\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (1)

The sample deviation would be $s=\sqrt{900}= 30$

The degrees of freedom are given by:

$df=n-1=2-25=24$

The Confidence is 0.954 or 95.4%, the value of $\alpha=0.046$ and $\alpha/2 =0.023$ , assuming that we can use the normal distribution in order to find the quantile the critical value would be $z_{\alpha/2} \approx 2.0$

The confidence interval would be

$1450-2.0\frac{30}{\sqrt{25}}=1450-12$

$1450+2.0\frac{30}{\sqrt{25}}=1450+12$

And the best option would be:

c. 1450 +/- 12

3 0

3 years ago

Shapers weighing 320 lb each are packed in shipping crates that each weigh

pychu [463]

Answer:

the answer is 5,110 pounds

Step-by-step explanation:

320+45=365

365x14=5,110

so in total it weighs 5,110 pounds

3 0

1 year ago

Could you guys help me solve 9 I would appreciate it :)

Drupady [299]

Answer:

Step-by-step explanation:

12<18/3(-2)+12 turns into 12<18/-6+12

False

5 0

2 years ago

What is (16(t^4) (k^12))^(0.25)

Triss [41]

Answer:

2tk^3

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers

Rectangle fence two sides will have lengths o 28 feet each and Ricky has 100 feet of fencing what is the greatest possible lengt

liraira [26]

Answer: 22

Step-by-step explanation: Perimeter of a rectangle is 2H + 2B = P

if each side has 28 feet then 28* 2 = 56. We take 100 - 56 = 44. Then we take 44/2 to find one remaining side = 22.

8 0

2 years ago