Homework: Ch 5.2 Practice A - MyLab
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5.2.13
Assume a member is selected at random from the population represented by the graph Find the probability that the
member selected at random is from the shaded area of the graph Assume the variable x is normally distributed
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The probability that the member selected at random is from the shaded area of the graph is (Round to four decimal places as needed)
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Answer:

Step-by-step explanation:

1) Find the Mean of all the numbers.

3+4+5+7+10+12+15=56

56/7=8 mean is 8

Now We Calculate Standard Deviation:

S=[tex]\sqrt{(3-8)^2+(4-8)^2+(5-8)^2+(7-8)^2+(10-8)^2+(12-8)^2+(15-8)^2}[/tex]

You take each number from the problem i.e 3,4,5...

and then you subtract the mean from it and then square it.

S=[tex]\sqrt{(-5)^2+(-4)^2+(-3)^2+(-1)^2+(2)^2+(4)^2+(7)^2}[/tex]

S=[tex]\sqrt{25+16+9+1+4+16+49}[/tex]

S=[tex]\sqrt{120}[/tex]

S=[tex]\sqrt{120}/7[/tex]

7 is the amount of data units given in the problem.

120/7=17.1428571429

[tex]\sqrt{17.1428571429}[/tex] =4.1403933560541

Nearest hundredth=4.14

Answer: x=2, x=-1

Step-by-step explanation:

First you have to make it so that everything is on the same side so 2x^2+7x-4

Then you do cross multiply 2x=4 and x=0. I don't know really how to explain it but the answer is x=2 x=-1

Answer:

Step-by-step explanation:

i will answer it if you give me the choices

Answer:

7/100

Step-by-step explanation:

This is literally what the percent sign means: "per hundred".

Answer:

Draw a double bar graph for the given information.

Class 5th 6th 7th 8th 9th

No. of Boys 20 40 25 35 20

No. of Girls 30 35 20 25 40

I hope it is helpful...

Answer:

7.25

Step-by-step explanation:

is your answer number 4

Answer:

x = 7

Step-by-step explanation:

A right angle is equal to 90 degrees

The sum of the angles, 55 and 5x, should equal 90

55 + 5x = 90

Isolate the variable

Subtract both sides by 55

55 - 55 + 5x = 90 - 55

5x = 35

Divide both sides by 5

5x ÷ 5 = 35 ÷ 5

x = 7

Answer:

) A (3, 5)            

(ii) B (-2, 7)          

(iii) C (-5, -8)      

(iv) D (9, -4)

Solution:

When rotated through 180° anticlockwise or clockwise about the origin, the new position of the above points is.

(i) The new position of the point A (3, 5) will be A' (-3, -5)

Answer:

i don't see what are you talking about . honestly

Answer:

B

Step-by-step explanation:

Closest answer

Answer:

1

Step-by-step explanation:

hope it helps . ans is c

Answer:

16.66%

Step-by-step explanation:

7500-6250=1250

1250/7500 x 100 = 16.66%

Answer:

[tex]\displaystyle \frac{x + 2}{x + 9}, \ x \neq -9, \ 12[/tex]

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Algebra I

Algebra II

Step-by-step explanation:

Step 1: Define

[tex]\displaystyle \frac{x^2 - 10x - 24}{x^2 - 3x - 108}[/tex]

Step 2: Simplify

We know that x cannot equal -9 because we would get a divide by 0 (undefined) error. We also know that x cannot equal 12 because it was canceled out when simplifying.

Answer:

3

Step-by-step explanation:

=6x-3(2x-1)

=6x-6x+3

=3 Answer

Answer:

4 now hurry

Step-by-step explanation:

Answer:

look up

Step-by-step explanation:

Answer:

The water droplet is in the air for two seconds.

Step-by-step explanation:

You can solve this by finding the times at which its height is zero.  The lesser of the two values will be upon launch, and the greater upon landing:

y = -16x² + 32x

Let y = 0

-16x² + 32x = 0

factor -16 out:

x² - 2x = 0

complete the square:

x² - 2x + 1 = 1

and solve for x

(x - 1)² = 1

x - 1 = ±1

x = 1 ± 1

x = 0, 2

So the water is at a height of zero at zero seconds and two seconds.  It's thus in the air for two seconds.

Answer:

B) 2 in x 5 in

Step-by-step explanation:

6 x 15   (divide each by 3)

2 x 5

Answer: its B

Step-by-step explanation:

Answer:

Suppose that you have a random point (x, y), and now you do a dilation from the origin with a scale factor of k.

Then the new coordinates of the point are:

(k*x, k*y)

Now, in this question, we have a dilation of scale factor k = 1/2.

Then if we start with the point (x, y), after the dilation we will have the point (x/2, y/2)

Now you can notice that instead of this, in the table we have (2*x, 2*y)

So this is the error, the transformation is not correctly calculated.

Answer:

-0.4285714286

Step-by-step explanation:

-3/7 = -0.4285714286

Answer:

124984638540

Step-by-step explanation:

just use a calculator

Answer:

6 and 4

Step-by-step explanation:

6+4 = 10

6-2 = 4

Answer:

The measure of Angle XYZ = 34

Step-by-step explanation:

Answer:

D-16

Step-by-step explanation:

Answer:

D. 16

Step-by-step explanation:

On one shelf, she can put 4 baskets.

So, on 4 shelves, she can put (4 x 4) 16 baskets.

Hope this helps :)

Answer:

A

Step-by-step explanation:

You should know the area of a circle, A = πr².

So, all you need to find is the area of half a circle, or A = [tex]\frac{1}{2}[/tex] πr²

We see that the radius is half of the diameter or r = 6 in.

A = [tex]\frac{1}{2}[/tex] (3.14)(6)²

A = 56.52 in²

Answer:

the answer is C

Step-by-step explanation:

there isn't much to learn here this is just something that you come to know off the top of your head

Answer:

h=52

Step-by-step explanation: You subtract 36 from both sides and it cancels on the right but on the left you do regular subtraction and you get that h equals 52

Answer:

h = 52

Step-by-step explanation:

h + 36 = 88

subtract 36 from both sides

h = 52

Answer:

The answer is 0 if there are 85 inches in the past year then there wouldn't be any in the present year.

Step-by-step explanation: