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4 years ago

Find the zero of the polynomial 2x²+9x+4

Mathematics

2 answers:

hammer [34]4 years ago

3 0

Answer:

x=-4 or x=-1/2=-0.500

Step-by-step explanation:

galina1969 [7]4 years ago

3 0

Answer:

x= -4 or x= -0.5

Step-by-step explanation:

use a quadratic formula calculator or graph it on desmos

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A data set includes 103 body temperatures of healthy adult humans for which x= 98.1 and s = 0.56.

lutik1710 [3]

Answer:

98.1, No does not contain, yes contains.

Step-by-step explanation:

Given that

sample size n =103

Sample mean = 98.1

sample std dev s = 0.56

a) the best point estimate of the mean body temperature of all healthy humans = sample mean =98.1

b) 99% confidence interval estimate of the mean body temperature of all healthy humans

We can use Z critical since sample size is large though sigma is not known

99% CI = $(98.1-\frac{0.56}{\sqrt{103} },98.1+\frac{0.56}{\sqrt{103} } )\\=(98.045, 98.155)$

This does not contain 98.6

This sample does not represent the population, i.e. may be biased sample.

c) CI of population mean

= populaiton mean + /- margin of error

=(98.545, 98.656)

Yes contains 98.6

5 0

3 years ago

Advice columnist Ann Landers once asked her readers with children to answer the following question: "If you had it to do over ag

ivanzaharov [21]

Answer:

Option D is correct

Step-by-step explanation:

This is true because people who have been emotionally affected by their children are probably more likely to respond than people who are happy with having children that is why it can be seen that we have a high response of "no"

6 0

3 years ago

In triangle JKL, m of angle J = 90, m of angle K = 30, and m of angle L = 60. Which of the following statements about triangle J

Jobisdone [24]

Answer:

# Answer B is true ⇒ KL = 2(JL)

# Answer C is true ⇒ JK = √3(JL)

# Answer F is true ⇒ JK = √3/2(KL)

Step-by-step explanation:

* Lets explain the ratio between the sides of the triangle

- In Δ JKL

∵ The measure of angle J is 90°

∴ KL is the hypotenuse

∵ The measure of angle K is 30°

∴ JL is the opposite side to angle 30°

∵ The measure of angle L is 60°

∴ JK is the opposite side to the angle 60°

- There is a fact in the triangle which has angles 30° , 60° , 90°

# The length of the side opposite to the angle of measure 30° is

half the length of the hypotenuse

∵ KL is the hypotenuse

∵ JL is the opposite side to the angle of measure 30°

∴ JL = 1/2 KL OR KL = 2 JL

# The length of the side opposite to the angle of measure 60° is

√3 the length of the opposite side to the angle 30°

∵ JK is the opposite side to the angle of measure 60°

∵ JL is the opposite side to the angle of measure 30°

∴ JK = √3 JL

# The length of the side opposite to the angle of measure 60° is also

half √3 the length of the hypotenuse

∵ JK is the opposite side to the angle of measure 60°

∵ KL is the hypotenuse

∴ JK = √3/2 KL

- From the relation above

# Answer B is true ⇒ KL = 2(JL)

# Answer C is true ⇒ JK = √3(JL)

# Answer F is true ⇒ JK = √3/2(KL)

6 0

4 years ago

Write y - 2 =- 1/3(x + 6) in standard form using integers.

polet [3.4K]

Answer:

x+3y=0

Step-by-step explanation:

6 0

3 years ago

If i make 7.25 an hour and work 4 hours a day for five days how much will i make

11Alexandr11 [23.1K]

Well if you make $7.25 an hour and work four hours then multiply

7.25 x 4 = 29

so you make $29 a day and you work fro 5 days multiply the amount and the days which is

29 x 5 = 125

so you make $125 dollars after working 4 hours a day for 5 days

4 0

3 years ago

Find the zero of the polynomial 2x²+9x+4​

Find the zero of the polynomial 2x²+9x+4