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4 years ago

Ik it's prob easy ques but help me i forgot everything

Mathematics

2 answers:

vivado [14]4 years ago

6 0

Answer:

-10

Step-by-step explanation:

Use order of operations, PEMDAS/GEMDAS, 4*(-3)=12, and 2-(-12)=-10

MaRussiya [10]4 years ago

5 0

Answer:

The answer is 14

Step-by-step explanation:

I used a calculator because when you grow older and have a phone, logically you will always have a calculator :)

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Subract the childs age in years from 30 then divide the result by 2

Alona [7]

Answer:

8pm? try that

Step-by-step explanation:

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3 years ago

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If 2y = 6 - 3x, find y when x = 0

MakcuM [25]

Answer:

2y= 6-3x when x=0

2y= 6-3(0)

2y= 6-0

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4 years ago

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A sociologist recently conducted a survey of senior citizens who have net worths too high to qualify for Medicaid but have no pr

hjlf

Answer:

a) $s= 9.74$

D. 9.74

b) $Median= 74$

B. 74

Step-by-step explanation:

Part a

We have the following dataset given:

69 74 75 62 70 93 64 69 61 88 67 77 87 90 66 91 77 63 82 82 71 74 76 65 83

We can begin calculating the sample mean with the following formula:

$\bar X = \frac{\sum_{i=1}^n X_i}{n}$

And replacing we got:

$\bar X = 75.04$

Now we can calculate the sample deviation with the following formula:

$s =\sqrt{\frac{\sum_{i=1}^n (X_i-\bar X)^2}{n-1}}$

And after replace we got:

$s= 9.74$

Part b

For this case we need to sort the value on increasing way:

[1] 61 62 63 64 65 66 67 69 69 70 71 74 74 75 76 77 77 82 82 83 87 88 90 91 93

And the median would be the value in the position 13 and we got:

$Median= 74$

6 0

3 years ago

Q26. Division A has 15 students and division B has 20 students. Average score of students in division A is greater by 2 as compa

Romashka [77]

Step-by-step explanation:

Let a be the total score of Div. A

Let b be the total score of Div. B

given,

$\frac{a}{15} - \frac{b}{20} = 2$

as equation 1.

and

$b - a = 160 \\ - a + b = 160$

as equation 2.

Now multiply equation 2 by 1/20 to eliminate b to solve for a.

$( - a)( \frac{1}{20} ) + (b)( \frac{1}{20} ) = ( \frac{1}{20} )(160) \\ - \frac{a}{20} + \frac{b}{20} = 8$

take this new equation as equation 3.

now we will use equation 1 + equation 3 to eliminate b to solve for a.

$( \frac{a}{15} + ( - \frac{a}{20} )) + ( - \frac{b}{20} + \frac{b}{20} ) = 2 + 8 \\ \frac{a}{60} = 10 \\ a = 60 \times 10 \\ = 600$

Div.A total score = 600

Average Score = Total Score / Number of students.

$\frac{600}{15} \\ = 40$

3 0

3 years ago

30 points!!!!!! please help quick!!!!

Elenna [48]

Answer:

Attachment: 1 Image

Step-by-step explanation:

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3 years ago

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