Eight boys and fifteen girls are in a classroom. What is the probability of choosing a boy or a girl from the
class?

Answers

Answer 1

Answer:

it would be 8 to 15

Step-by-step explanation:

you would write it as a fraction 8/15. then, you would try and simplify it. because you cant simplify 8/15 anymore, your answer would be 8/15! hope this helps :)


Related Questions

1/3 exponent 4??? pls help immediately

Answers

1/3 to the power of 4 equals 1/81

How much fencing is needed to enclose a field that is 300 meters by 600 meters?

Answers

........300
600.......600
........300
So (300(2))+(600(2))=1800 meters of fencing

1800 meters of fencing is required to enclose a field.

Given that, the dimension of the field is 300 meters by 600 meters.

What is the perimeter of a rectangle?

The perimeter of a rectangle is the total distance of its outer boundary. It is twice the sum of its length and width and it is calculated with the help of the formula: Perimeter = 2(length + width).

Now, the perimeter of the rectangular field=2(600+300)

=2×900=1800 meters.

Therefore, 1800 meters of fencing is required to enclose a field.

To learn more about the perimeter of a rectangle visit:

https://brainly.com/question/2142493.

#SPJ2

Factor out the coefficient of the variable 2/3j - 2/9

Answers

answer: hey lol*sharts loudly*

Step-by-step explanation:

you just need to use the bathroom next time;))))

A battery is charged. The percentage of the battery's capacity that is charged as a function of time (in minutes) is graphed. graph At what rate is the battery charged? Choose 1 answer: Choose 1 answer: (Choice A) A 20 percent per minute (Choice B) B 1 percent per minute (Choice C) 2 percent per minute (Choice D) 10 percent per minute

Answers

The answer is -12 percent

Answer:

12%

Step-by-step explanation:

Just do 12% it is correct the other one is wrong

(0,3), (4,15), (5,33), determine the equation of the parabola they represent. State the direction the parabola opens.

Answers

Answer:

y = 3x² – 9b + 3 and the parabola opens upwards since a = 3 > 0.

Step-by-step explanation:

The general equation of a parabola is:

y = ax² + bx + c

So we have to solve for a, b and c to get our equation with the 3 given points.

When x = 0 and y = 3 we have

3 = a(0)² + b(0) + c, this means c = 3

When x = 4 and y = 15

15 = a(4)² + b(4) + 3 we have

16a + 4b = 12 which is

4a + b = 3

When x = 5 and y = 33 we have

33 = a(5)² + b(5) + 3 we have

25a + 5b = 30 which gives

5a + b = 6.

We have two equations

4a + b = 3

5a + b = 6

Eliminating b we have

a = 3, substituting a = 3 in the first equation we have

4(3) + b = 3

12 + b = 3

b = –9

Our equation therefore is:

y = 3x² – 9b + 3 and the parabola opens upwards since a = 3 > 0.

What is : [tex]7a + 8b + 9a + 4b + b =[/tex]

Answers

Answer: 16a + 13b

Step-by-step explanation: combine like terms:

7a + 9a

8b +4b +b

= 16a + 13b

Answer:

16a + 13b

Step-by-step explanation:

7a + 9a = 16a

Remember: a number without coefficent is 1

8b + 4b + b = 13b

Which of the following is equal to 5 1/3?

Answers

We’re is the problem¿
The answer is 17! Hope that helps

Help me Please 20 POINTS

When two variables are in a proportional relationship, which of the following is true about

1 their values.
2 their sums are a constant
3 their differences are a constant
4 their products are a constant
5 their quotients are a constant

Answers

Answer:

(5)

for eg;

3/5 is proportional to 15/25

Answer:

I would say 1 or 4

Step-by-step explanation:

Proportional relationships are relationships between two variables where their ratios are equivalent. Another way to think about them is that, in a proportional relationship, one variable is always a constant value times the other. That constant is know as the "constant of proportionality".

what is the image of (6,-6) after a dilation by a scale factor of 4 centered at the origin

Answers

9514 1404 393

Answer:

  (24, -24)

Step-by-step explanation:

Dilation centered at the origin multiplies each coordinate by the dilation factor.

  image = 4 × (6, -6)

  image = (24, -24)

Give the slope between the points
(-2,0) (-11,-4)

Answers

Answer:

Step-by-step explanation:

12,12

Answer:

The slope is 4/9

10. If a rectangular prism has a volume of 60 cubic inches and all dimensions are doubled, what is the new

volume?

d. 30 in

c.

b. 120 in

60 in

480 in

a.

Answers

Answer:

New volume on this is 480 cubic inches

Step-by-step explanation:

The volume of a rectangular prism is area of base * height

That would be;

l * b * h = lbh

we have all this as 60

Doubling all, we have

2l * 2b * 2h = 8lbh

Recall lbh = 60

So 8lbh = 8 * 60 = 480 cubic inches

Which signs do you have to fill ( + , - , × , ÷ , √ , = ) in between the numbers to make this a true equation.


74205, 3 , 169 , 490 , 1701 , ​(1/8) , 15262 , 2²

Answers

Answer:

put them in order

Step-by-step explanation:

1/2+2-3=309y6

Which expression is equivalent to (m2p–2r7)(m–5p4r2)?

Answers

Answer:

=(m2p+−2r7)(m+−5p4r2)

=(m2p)(m)+(m2p)(−5p4r2)+(−2r7)(m)+(−2r7)(−5p4r2)

=m3p−5m2p5r2−2mr7+10p4r9

=10p4r9−5m2p5r2−2mr7+m3p

Step-by-step explanation:

:D

Based on the position vs. time graph, which velocity vs. time graph would correspond to the data? A graph with horizontal axis time (seconds) and vertical axis position (meters). A line runs straight upward from 0 seconds 0 minutes.

Answers

Answer:

C or the graph with continuous acceleration (straight line)

Step-by-step explanation:

It's the right answer on edguinity

Answer:

c

Step-by-step explanation:

Stainless steels can be susceptible to stress corrosion cracking under certain conditions. A materials engineer is interested in determining the proportion of steel alloy failures that are due to stress corrosion cracking. In the absence of preliminary data, what is the minimum sample size required to ensure a 90% confidence interval for p to within 0.02

Answers

Using the z-distribution, as we are working with a proportion, the minimum sample size required to ensure a 90% confidence interval for p to within 0.02 is of 1692.

What is a confidence interval of proportions?

A confidence interval of proportions is given by:

[tex]\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

In which:

[tex]\pi[/tex] is the sample proportion.z is the critical value.n is the sample size.

The margin of error is of:

[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

In this problem:

No prior estimate, hence the proportion is [tex]\pi = 0.5[/tex].Margin of error of M = 0.02.90% confidence level, hence[tex]\alpha = 0.9[/tex], z is the value of Z that has a p-value of [tex]\frac{1+0.9}{2} = 0.95[/tex], so [tex]z = 1.645[/tex].

Then, solving for n:

[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

[tex]0.02 = 1.645\sqrt{\frac{0.5(0.5)}{n}}[/tex]

[tex]0.02\sqrt{n} = 1.645(0.5)[/tex]

[tex]\sqrt{n} = \frac{1.645(0.5)}{0.02}[/tex]

[tex](\sqrt{n})^2 = \left(\frac{1.645(0.5)}{0.02}\right)^2[/tex]

[tex]n = 1691.3[/tex]

Rounding up, a sample size of 1692 is needed.

More can be learned about the z-distribution at https://brainly.com/question/25890103

6 cm
8 cm
8 cm
12 cm
The perimeter of the polygon above is

Answers

Answer:

12 cm !!!

hope you mark me bainliest or your friend

4) Adult tickets for the evening show at XD Theater are $11 and children's tickets are $Belf the theater seats 250 people, how many adult tickets must be sold for $2.300 of total sales? Answer: adult tickets ​

Answers

Omitted value: The price of children ticket was omitted in the question, so i used $8 to solve. You can input the correct value and solve the same way following the steps.

Answer: 100 adult tickets  must be sold.

Step-by-step explanation:

step 1

let  x represent Adults

AND y represent children

Since the theater seats 250 people we have that

x+y = 250..... equation 1

Also price for Adult ticket = $11

and  price children ticket =$8

With total sales at $2,300, we have that

11x + 8y= 2300----- equation 2

Step 2

Making y subject in equation 1

' x+y = 250

y= 250-x

Putting y= 250- x in equation 2

11x + 8(250-x)= 2300

11x +2000-8x= 2300

11x -8x = 2300-2000

3x= 300

x 300/3

x= 100.

To find y

 x+y = 250

100+y=250

y=250-100

y=150

Therefore 100 adult tickets and 150 children tickets must be sold to get a total sales of $2,300

On a map, 4 inches represents 240 miles. What is the scale of the map?

Answers

The answer would be 60 because to find the scale you would need to divide the miles by inches
60 you divide 240 miles by the 4 inches

HEEEEEEEEEEELLLLLLLPPPPP PLEASE );
Kingston deposited $90 in a savings account earning 6% interest, compounded annually. To the nearest cent, how much will he have in 2 years?

Answers

Answer: 101.12

Step-by-step explanation: This answer is rounded to the nearest cent. The other is not, and will count it wrong.

Find the missing side lengths leave your answerss as radicals

Answers

Answer:

a= 5[tex]\sqrt{2}[/tex]

b=5

I need help I’m graphing this please help out

Answers

Answer:

Step-by-step explanation:

Answer:

y-intercept(0, -9)

Step-by-step explanation:

1. In the Mauritius warehouse, 145 kg of corn and 105 kg of beans are stored. Answer back:
A) What percentage of the total production does corn represent?
B) What percentage of the total production does beans represent?

Answers

Answer:A) 58% and B) 42%

Step-by-step explanation:

Plz brainliest: I’m almost an expert plz

TRUE or FALSE. Coordinates and position are written the same way but show different information?

Answers

Answer:

True.

Step-by-step explanation:

Round your answer to tenth place. A park has a triangular sandbox. Todd wants to create a smaller sandbox at his backyard having the same angles as the park sandbox. Drawings of both sandboxes are shown. 14 ft 18 ft 20 ft Park Sandbox 8 ft Todd's Sandbox What is the perimeter, in feet (ft), of Todd's sandbox? DOLL​

Answers

No picture given for this problem. Repost.

Let’s fix some n e {1,2,3,...}. A biased coin with probability of head p is tossed n times, and the number of heads, N1, is counted. The coin is then tossed Ni more times, and the number of heads, N2, is counted. Find the expected total number of heads, E[Ni + N2], generated by this process. The answer should depend on n and p only.

Answers

Answer:

The answer is "np(1+p)".

Step-by-step explanation:

[tex]N_1[/tex] = Number of n tossed heads  

According to [tex]N_1[/tex], Y = amount of [tex]N_1[/tex] tossing heads

So, [tex]N_1[/tex]~ Bin(n, p) and [tex]N_2[/tex] | [tex]N_1[/tex] ~ Bin([tex]N_1[/tex], p)

[tex]E(N_1+N_2) & = E\Big[N_1+N_2\vert N_1\Big]\\ &[/tex]

                   [tex]= E(N_1)+E\Big[N_2\vert N_1\Big]\\\\ & = E(N_1) + E(N_1\,p)\\\\ & = np + np.p \\\\ =np+np^2\\\\ =np(1+p)[/tex]

danny bought a shirt that was first put on sale for 30% off that went on clearance for an additional 40% off. what is the markdown if the original price was $94.99

Answers

Answer:

The total is $28.50

Step-by-step explanation:

What is the missing number?

Question 4 options:

Answers

Answer:

i dont see it

Step-by-step explanation:

1. Jake makes $11.15 per hour and works for 28 hours. What is his

straight-time pay? (Financial 1.1)

SHOW YOUR WORK

Answers

Answer:

$312.2

Step-by-step explanation:

Given that:

Amount earned per hour = $11.15

Number of hours worked = 28 hours

Straight time pay is the total amount earned in a given pay period. Hence,

Starlight time pay earned during the period he worked will be :

Amount per Hour * number of hours

$11.15 * 28 = $312.2

PLEASE HELLPP MEEEEEEEEeeeeeeeeeeeeeeeeee

Answers

Answer:

D, 32

Step-by-step explanation:

First input all the numbers. Then do what’s inside the parenthesis first then multily by 12. lastly divide that number by 2.4

Answer:

32

Step-by-step explanation:

[tex]\frac{12(4+2.4)}{2.4}\\\frac{12(6.4)}{2.4} \\ \frac{76.8}{2.4}=32[/tex]

I’m not very good at math, anyone can answe this plz and thanks

Answers

Answer:

B

Step-by-step explanation:

Answer:

If it is asking for the total of both then it should be 6 1/4

Step-by-step explanation:

I added 4 3/4 and 1 1/2

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