Mathematics High School

Ana is a teacher who plays a review game with her class. The game involves writing each student's name on
an identical slip of paper and selecting students at random. Here's the makeup of her class:
Grade
9th 10th 11th
Number of students
12. 9. 7.
Suppose that Ana picks a name, replaces it, and picks a name again.

What is the probability that NEITHER of the students selected are
9th graders?
Round your answer to two decimal places.

Answers

Answer 1

Answer:

P(Neither 9th grade)=16/28*16/28=16/28*16/28=(16/28)^2=256/784≈0.3265

Answer:

The probability that neither of the students selected are 9th graders is about 0.33.

Step-by-step explanation:

Pls give brainliest

Answer 2

Probabilities are used to determine the chances of events

The probability that neither of the students is a 9th grader is 0.33

From the table, the number of students that are not 9th graders are:

[tex]N9 =9 + 7[/tex]

[tex]N9 =16[/tex]

The total number of students is:

[tex]Total =12 + 9 + 7[/tex]

[tex]Total =28[/tex]

The probability that neither of the students is a 9th grader is calculated as follows

[tex]P =P(N9) \times P(N9)[/tex]

So, we have:

[tex]P =\frac{16}{28} \times \frac{16}{28}[/tex]

Multiply

[tex]P =\frac{256}{784}[/tex]

Divide and approximate

[tex]P =0.33[/tex]

Hence, the probability that neither of the students is a 9th grader is 0.33

Related Questions

The population of a place was 56000. Next 5 years it is expected to rise by 50%. What will be the population in next 5 years?

Answers

Answer:

84000 people

Step-by-step explanation:

So next 5 year wil be 56000 + 50%

56000 = 100%

50% = 56000 / 2

50% = 28000

56000 + 28000 = 84000

Confused help please

Answers

Answer:

130

Step-by-step explanation:

1 and 2 form a straight line, so they are supplementary. That means they add up to 180. So,

a1+a2=180

50+a2=180

a2=130

Answer:

it would be B.130

Step-by-step explanation:

considering an angle can only go to 180* subtract 50 from 180 and you get 130

How do you know it is positive or negative in exponents.

Answers

When using exponents there will be a negative sign before the exponent. If the exponent is positive it will not have any sign it will just be the number

- You find a recipe for cookies. You want
to know how much sugar is in each cookie.
The recipe uses 3/4 cup of sugar and makes
one-dozen cookies. Find the amount of sugar
per cookie. Show unit rate work. Use fractions
not decimals.

Answers

Answer:

1/16

Step-by-step explanation:

3/4 ÷ 12

3/4 x 1/12

3/48 or 1/16

Hope this helps!

Answer:

1/16

Step-by-step explanation:

recipe uses 3/4 cup of sugar for one dozen cookies

3/4 cup ------ 12 cookies

x ------- 1 cookie

x * 12 = 3/4

x = 3/4 / 12

x = 3 / (4*12)

x = 1 / 4*4

x = 1/16

How to simplify -7 + 3 - 20

Answers

Answer:

-24

Step-by-step explanation:

-7 +3 is -4

-4+-20 is -24

-7 + 3 - 20

= -4 - 20

= -4 + -20

= -24

______

Hope it helps ⚜

phân tích đa thức thành nhân tử 8x^2+16xy

Answers

Answer: 8x^2+16xy= 8x(x+2y)

Anyone helps me pleaseeeeee✨
I will so so so love you if you help me to solve it!!!!!!!!!

Answers

Answer: Hope it helps :)

Step-by-step explanation:

The essential thing to learn from this lesson is the translation of equations. When f(x) = f'(x) + a, the graph of the equation is shifted up by a units.

When f(x) = f'(x + a), the graph of the equation is shifted left by a units.

6=2(y+2) solve for what is y?

Answers

Answer:

y is 1

Step-by-step explanation:

Answer:

y = 1

Step-by-step explanation:

First divide both sides by 2

this gives you 3 = y+2

then subtract 2 from each side giving you y = 1

Creflo is 6 years older than Dean.
Raheem is twice as old as Creflo.
The sum of their ages is 34.
Work out the ratio of Dean's age to Creflo's age to Raheem's age.

Answers

C = D + 6
R = 2C
D + C + R = 34

R = 2 (D+6)
R = 2D + 12

D + (D + 6) + (2D + 12) = 34
Add like terms.

4D + 18 = 34
4D = 34 - 18
4D = 16
D = 4

C = D + 6
C = 4 + 6
C = 10

R = 2C
R = 2(10)
R = 20

Write as ratio.
D:C:R
4:10:20

Which expression shows the number 19.65 correctly decomposed?

19 + 0.6 + 0.05
10 + 9 + 0.6 + 0.05
10 + 0.6 + 0.05
19 + 9 + 0.6 + 0.05

Answers

Answer: 10 + 9 + 0.6 + 0.05

Answer:

..............................................................

Step-by-step explanation:

..........................................................................

What is the median of 8,19,36,46,56

Answers

Answer:

median = 36

Step-by-step explanation:

The median is the middle value of the data arranged in ascending order.

8 19 36 46 56

↑ middle value

median = 36

What is the solution to 1/2 |x| = -3
Options:

x = -6

x = -6 or x = 6

x = -6 or x = 2

No solutions exist.

Answers

Answer:

No solution

Step-by-step explanation:

multiplying both sides by 2 gives |x|=-6 but an absolute value can't be negative so there are no solutions

see more at: https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-negative-number-topic/cc-6th-absolute-value/a/intro-to-absolute-value

answer..............................

Answers

Answer:

yes

Step-by-step explanation:

Billy and Michael have 2 lemonade stands. Billy charges $2 per lemonade plus a flat rate of $2.
Michael charges $3 per lemonade plus a flat rate of $1.

How many lemonades would they have to sell to be making the same amount of money?

Answers

1 lemonade.

2x+2=3x+1

-x+2=1
-x=-1
x=1 lemonade

A grocery store buys cashews for
$8 per pound. The store wants to
markup the price by 20%. Which
expression below could be used to
find the new price of the cashews

Answers

Answer:

9.6

Step-by-step explanation:

20%of 8=8*20/100 =1.6 and the new price of the cashews is1. 6+8=9.6

HELP AGAIN PLSSSSSSS

Answers

Answer:

didn't you already do it? im confused

Step-by-step explanation:

solve pls brainliest

Answers

Answer:

B) y = kx

Step-by-step explanation:

A Proportional relationship should have an equivalent ratio

All of the answers have a pass through the origin except y = kx because k is unknown.

CAN SOMEONE HELP ME PLEASE ASAP!

Answers

quick question is this area or perimeter?

Answer:

2 and 3

Step-by-step explanation:

to be similar, there must have been the same scaling factor applied for length and width.

when going from 2 to 3 the width changes from 5 to 7, that is a changing factor of 7/5 = 1.4

and the length changes by the same factor :

6.5 × 7/5 = 1.3 × 7 = 9.1

What is
2(3x + 4) = -28

Answers

Answer:

x= 10/3

x= 3.334

Depending on simplified form asked.

Step-by-step explanation:

6x +8 =28

subtract 8 from both sides

6x = 20

divide by 6

x=20 /6

x= 10/3 or x =3.334

if you like my answer, please mark me brainliest !! thanks !! <3

x = -6
2(3x + 4) =-28
divide both sides by 2
2(3x+4)/2 = -28/2
after dividing its 3x + 4 = -14
subtract 4 from both sides
3x + 4 - 4 = -14 - 4
after subtracting its 3x = -18
divide 3 from both sides
3x/3 = -18/3
x = -6
Hope it help

3x + 3 = 2x + 12 i need help for this answer

Answers

Answer:

X=9

Step-by-step explanation:

3x+3=2x+12

3x-2x=12-3

x=9

Find slope of line (I need to see if you get the same answer as me to know if it’s right)

Answers

Answer: -5

Step-by-step explanation:

Point #1: (-4, 2)

Point #2: (-3, -3)

Slope: -5

Answer:

Slope=M=-5Full equation y=5/7x-18

Step-by-step explanation:

(-3,-3),(4,2) y=mx+b

input variables for the full equation for slope, rise/run

it rise's up 5 and runs back -1 so slope is -5

What is the missing value?
X
1
2
3
4.
5
у
6
11
16
21

Answers

Answer:

25555555557777385381938$88388+2

i am stuck on this zearn lesson someone pls help

Answers

The answer is 2/1, I think. :)

Answer:

2 or 2/1

Step-by-step explanation:

For every cup of water there is 1 cup of water. As seen in the ration 6:12 (reduced to 1:2) and 1/2:1 (increased to the whole number of 1:2)

What's the circumference of a
circle with a radius of 5 inches?
Use 3.14 for i.
C = [?] inches

Answers

Answer:

31.4 inches

Step-by-step explanation:

c = 2 * 3.14 * r

c = 2 * 3.14 * 5

C = 31.4 inches

I need help

Given f(x)=-x+6 write an equation for f(x-2)

Answers

Answer:

f(x - 2) = - x + 8

Step-by-step explanation:

Substitute x = x - 2 into f(x)

f(x - 2) = - (x - 2) + 6 = - x + 2 + 6 = - x + 8

Melanie buys a carrying case for her new laptop, which costs 125% as much as her old laptop case. The price of her new laptop carrying case is $65. If n represents the cost of her old laptop carrying case, which proportion can be used to find n?

Answers

Answer:

Step-by-step explanation:

Because don't know old laptop cost.

So 65 dollars represent 100% and n(old case) represents 125%.

Will give brainliest!

Answers

Answer:

D. 5/4

Step-by-step explanation:

Reciprocal is flipping that number around

Select the choice that translates the following verbal phrase correctly to algebra: (1 point)

the product of 12 and y increased by 11
12(y + 11)
12y + 11
12 + 11y
12(11y)

Answers

Answer:

[tex]⟼12(y + 11)[/tex]

Write an equation in slope-intercept form for the line passing through the two points (0,-2) and (3,0)

Answers

Answer:

y = (2/3)x - 2

Step-by-step explanation:

This problem is interesting in that both the x- and the y-intercepts are given. The y-intercept is (0, -2), and so 'b' in 'y = mx + b' must be -2:

y = mx - 2. The x-intercept is (3, 0), so we know that y = 0 when x = 3:

0 = m(3) - 2

This latter result must be solved for m: 3m = 2, or m = 2/3.

Then the desired equation is y = (2/3)x - 2.

i need help!!!!!!!!!!

Answers

Answer: Read the Explanation

Step-by-step explanation:

m<7 = 120

m<5 = 120

m<6 = 60

m<2 = 60

The reason why they are 60 is because they are supplementary angles to complete a straight line so like since 3 = 120 4 = 60 since its a straight line.

Answer:

Step-by-step explanation:

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