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4 years ago

+5+6 9+10- 6+2 9-7 3-5 18-12

Mathematics

1 answer:

DENIUS [597]4 years ago

6 0

Answer:-496

Step-by-step explanation:

5+69+10−6+29−73−518−12

=74+10−6+29−73−518−12

=84−6+29−73−518−12

=78+29−73−518−12

=107−73−518−12

=34−518−12

=−484−12

=−496

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Which statements are true? check all that apply. twenty-three ninth graders and fifteen eleventh graders prefer math. fourteen e

Vlad [161]

The true statements are;

fourteen eleventh graders prefer math and eight tenth graders prefer english.
twenty-three ninth graders and thirty-five twelfth graders prefer math.

<h3>What is a survey?</h3>

In a survey, the opinions of the subjects are sought and these responses are recorded for the purpose of use in the process of decision making.

In this, case, we can see from the table that;

fourteen eleventh graders prefer math and eight tenth graders prefer english.
twenty-three ninth graders and thirty-five twelfth graders prefer math.

Learn more about survey:brainly.com/question/3944932

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2 years ago

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PLEASE HELP ASAP! FINDING SLOPE!

matrenka [14]

The answer is - 3/4

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4 years ago

The quadratic 3x^2-24x+72 can be written in the form a(x+b)^2+c, where a, b, and c are constants. What is a+b+c?

Kipish [7]

Answer:

Step-by-step explanation:

Quadratic Equation: 3x² - 24x + 72

The form we are to convert the equation to:

3x² - 24x + 72

a(x + b)² + 72

3(x² - 8x + 24)

Step 1

Make the Quadratic equation (x² - 8x) in the bracket factorisable using completing the square method

3( x² - 8x +(- 8/2)²) + 24

3( x² - 8x + 16 = -24 + 16

3( x² - 8x + 16 + 8 = 0)

3( x² - 8x + 16) + 8

3( x² - 4x + 4x + 16) + 8

3( x(x - 4) -4(x - 4) + 8

3((x - 4)(x - 4) )+ 8

3( (x - 4)² + 8

Using this form

a(x + b)² + c

a = 3

b = -4

c = 8

We were asked to add up constants a, b, c

Therefore,

3 +(-4) + 8

= 7

3 0

3 years ago

According to the WHO MONICA Project the mean blood pressure for people in China is 128 mmHg with a standard deviation of 23 mmHg

Alja [10]

Answer:

a) Let X the random variable that represent the blood pressure for people of a population, and for this case we know the distribution for X is given by:

$X \sim N(128,23)$

Where $\mu=128$ and $\sigma=23$

b) $P(X\geq 135)=P(\frac{X-\mu}{\sigma}\geq \frac{135-\mu}{\sigma})=P(Z\geq \frac{135-128}{23})=P(Z\geq 0.304)$

And we can find this probability using the complement rule:

$P(Z\geq 0.304)=1-P(Z$

And in order to find this probabilities we can use tables for the normal standard distribution, excel or a calculator.

$P(Z\geq 0.304)=1-P(Z$

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Part a

Let X the random variable that represent the blood pressure for people of a population, and for this case we know the distribution for X is given by:

$X \sim N(128,23)$

Where $\mu=128$ and $\sigma=23$

Part b

We are interested on this probability

$P(X\geq 135)$

And the best way to solve this problem is using the normal standard distribution and the z score given by:

$z=\frac{x-\mu}{\sigma}$

If we apply this formula to our probability we got this:

$P(X\geq 135)=P(\frac{X-\mu}{\sigma}\geq \frac{135-\mu}{\sigma})=P(Z\geq \frac{135-128}{23})=P(Z\geq 0.304)$

And we can find this probability using the complement rule:

$P(Z\geq 0.304)=1-P(Z$

And in order to find this probabilities we can use tables for the normal standard distribution, excel or a calculator.

$P(Z\geq 0.304)=1-P(Z$

3 0

4 years ago

ASAP PLZ HELP

jok3333 [9.3K]

Answer:

Step-by-step explanation:

yeah too hard

4 0

4 years ago

Read 2 more answers

+5+6 9+10- 6+2 9-7 3-5 18-12​

+5+6 9+10- 6+2 9-7 3-5 18-12