A bag contains five white balls and five black balls. Your goal is to draw two black balls.

a) You draw two balls at random. What is the probability that they are both black?

b) You draw two balls at random. Once you have drawn two balls, you put back any white balls, and redraw so that you again have two drawn balls. What is the probability that you now have two black balls? (Include the probability that you chose two black balls on the first draw.)

Question

During one waiters shift he delivered 13 appetizers, 17 entrées, and 10 desserts what percentage of the dishes he delivered were: A. Desserts B. Appetizers  C. entrees

Answer:

A)Desserts = 25 %

B)Appetizers = 32.5 %

C)Entrées =  32.5 %

Step-by-step explanation:

Given:

Number of appetisers = 13

Number of entrees =   17

Number of  desserts = 10

Solution:

Total number  of dishes = 13 + 17 + 10 = 40

percentage of the dishes he delivered were Desserts is   =  [tex]\frac{10}{40} \times 100 = 0.25 \times 100 = 25%[/tex]

percentage of the dishes he delivered were Appetizers is  =[tex]\frac{13}{40}\times 100 = 0.325 \times 100[/tex]  = 32.5%

percentage of the dishes he delivered were Entrées is = [tex]\frac{17}{40} \times 100 = 0.425 \times 100[/tex]=  42.5 %

To find the percentage of each type of dish a waiter has delivered, add up the total number of dishes, then divide the number of each type of dish by this total and multiply by 100.

The subject question requires us to determine what the percentage is of the various types of dishes a waiter delivers during his shift. We're given that the waiter delivered 13 appetizers, 17 entrees, and 10 desserts. We can solve this by doing some basic calculations:

First, we need to figure out the total number of dishes the waiter delivered. We do this by adding together the appetizers, entrees, and desserts he delivered: 13 appetizers + 17 entrees + 10 desserts = 40 dishes in total.

Next, to find the percentage of each type of dish, we divide the number of that type of dish by the total number of dishes, and then multiply the result by 100. For example, for appetizers: (13 appetizers / 40 total dishes) * 100 = 32.5%.

You can do the same calculations for entrees and desserts to find their percentages. These basic calculations are useful not only in a restaurant setting, but also in allocation of tasks in modern businesses and in many other real-world scenarios.

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Answer:

The function in the fourth option will have an axis of symmetry at x = 3.

Step-by-step explanation:

We have to choose the function from options, the graph of which has an axis of symmetry at x = 3.

The function in the fourth option will have an axis of symmetry at x = 3.

It is f(x) = x2 – 6x – 1 On a coordinate plane, a parabola opens up. It goes through (0, negative 1), has a vertex at (3, negative 10), and goes through (6, 0). (Answer)

Answer:

D

Step-by-step explanation:

Answer:

$929.60

Step-by-step explanation:

step 1

Find the area of Lauren's bedroom

Remember that the area of a rectangle is equal to

[tex]A=LW[/tex]

so

[tex]A=(18)(12)=216\ ft^2[/tex]

step 2

Find the area of closet

Remember that the area of a rectangle is equal to

[tex]A=LW[/tex]

so

[tex]A=(2)(4)=8\ ft^2[/tex]

step 3

Find the total area

Adds the areas

[tex]216+8=224\ ft^2[/tex]

step 4

Find the cost

Multiply the total area by the cost per square feet

so

[tex]224(4.15)=\$929.60[/tex]

Final answer:

The cost to carpet Lauren's bedroom including her closet is found by calculating the total area and then multiplying by the carpet's cost per square foot. The total area is 224 square feet and with a carpet cost of $4.15 per square foot, the total cost is $930.40.

Explanation:

To calculate the cost to carpet Lauren's room and closet, we must first determine the total area that needs to be carpeted. We already know that the room measures 18 feet by 12 feet. Taking the square footage of the room, we perform a multiplication: 18 ft  imes 12 ft = 216 square feet.

Next, we calculate the area of the closet separately, which measures 2 feet by 4 feet. The calculation would be 2 ft  imes 4 ft = 8 square feet. Now, we add the area of the room and the closet to get the combined area: 216 sq ft + 8 sq ft = 224 square feet.

Lastly, we find the cost to carpet this combined area. The carpet costs $4.15 per square foot, therefore, we multiply the total area by the cost per square foot: 224 sq ft  imes $4.15/sq ft = $930.40. So, the total cost to carpet Lauren's room and closet will be $930.40.

Answer:

-3

Step-by-step explanation:

to find the scale factor dividex^1 by x (so old shape to new shape)

Answer:

Weekly allowance $4

Step-by-step explanation:

Fred ended with $11. So, subtract $9 from washing the car.

$11 - $9 = $2

$2 Is the amount of weekly allowance Fred hasn't spent yet. However, at the beginning of the week, Fred used half his allowance. This means $2 was what was left. So,

$2 × 2 = $4

meaning Fred had $4 in allowance at the beginning of the week.

The original price is $450.

Step-by-step explanation:

Step 1:

Given details, Discount%, D% = 30 and Selling Price, SP = $315

Step 2:

Write down formula for calculating the Original Price

Selling Price (SP) = Original Price (OP) - Discount (D)

Discount (D) = Original Price (OP) * (D%/100)

Step 3:

Substitute given values in the formula

315 = OP - D

D = [tex]OP \times30/100[/tex]

D = 0.3 OP

Step 4:

Substitute value of D in the first formula

315 = OP - 0.3 OP

315 = OP (1 - 0.3) = 0.7 OP

Original Price, OP = 315/0.7 = $450

Step-by-step explanation:

9x2= 3 • 3 • x2

6x= 3 • 2 • x

12x= 2 • 2 • 3 • x

8= 2 • 2 • 2

First, let's move combine like terms:

-5y + 8y = 6 + 2 -12.

3y = -4.

y = -4/3

Answer:

x = -3 + 2y

Step-by-step explanation:

I'm not sure if that's correct, sorry, dear~!

Answer:

We are given the table as:

x    f(x)

0     6

2      7

4      0

7      5

i.e. corresponding to different values of x we are given the values of f(x)

we have to find the value of f(0)

i.e. we have to find the value of f(x) when x=0

As we can see from the table the value of f(x) at x=0 is 6

Hence, Correct option is:

C) 6

Have a Great day!

Answer:

c

Step-by-step explanation:

Answer:

10

Step-by-step explanation:

if you take 8 and divide it by 4 you get 2 meaning that each fifth is 2 pounds. if there are 5/5 that means there are 10 pounds

Answer:

infinite solutions

Step-by-step explanation:

6x + 18 = 2(3x + 9)

1. 6x + 18 = 6x + 18                      Distribute the 2

2. X can be any number since they are the same.

Answer:

$28

Step-by-step explanation:

Since each person got $14 and we know that there are 2 people receiving money, the total amount of money is equal to the amount of money John received, added to the amount of money his best friend got. Since both received $14, we can use the following equation:

Money found = $14 + $14 = $28

Answer:

The answer is 28.27

Answer:

There will be 13 songs in the final album.

Step-by-step explanation:

i) number of songs expected = 16 songs

ii) the band wrrites 62.5% more

   therefore the band writes [tex]16 \times ( 1 + 0.625) = 16 \times 1.625 = 26[/tex] songs

iii) During the editing process 50% of the songs are removed.

   Therefore there will be in the final album = [tex]( 1 - 0.5) \times 26 = 0.5 \times 26 = 13[/tex] songs.

Answer:

D

Step-by-step explanation:

Answer:-12+6y

Step-by-step explanation:

Since the 12 is a negative and the 6y is a positive you can switch it around.

The expression 6y - 12 is equivalent to 6(y - 2). This can be verified by expanding the factored form, which results in the original expression.

This expression  can be factored to find an equivalent expression. Factoring out the greatest common factor (GCF) from both terms, we get:

Thus, the expression 6y - 12 is equivalent to 6(y - 2).

Answer:

[tex]\left[\begin{array}{cc}0&2\\3&3\\6&4\\9&5\end{array}\right][/tex]

Step-by-step explanation:

+2 means that when c is at 0 w is at 2.

1/3c means that c moves up 3 at a time.

Answer:

B) 1

Step-by-step explanation:

Answer:1

Step-by-step explanation:

Answer:

Step-by-step explanation:

30/5=6

Final answer:

Benjamin rides his scooter for a total of 6 miles over a period of 10 days, by multiplying the daily distance of 3/5 mile by 10 days.

Explanation:

To calculate the distance Benjamin rides his scooter over 10 days, we multiply the daily distance by the number of days. Benjamin rides 3/5 of a mile each day.

Distance per day = 3/5 mile
Number of days = 10 days

The total distance is:

3/5 mile/day × 10 days = 6 miles

Therefore, the correct answer is  Benjamin will have traveled a total of 6 miles over the course of 10 days.

Answer:

6

Step-by-step explanation:

5 1/2

(5×2+1)/2

11/2

5.5

6 ( nearest whole number)

Answer:

Since AC is perfectly equal to BD, 4x-60=30-x. If you solve for x, x=18. Then plug 18 into BD=30-x. Therefore, BD=12.

When there's no number in front of a variable, that means it has a coefficient of 1.

So the coefficient is 1. Hope that makes sense.

The coefficient of the c-term of the algebraic expression 14a - 72r - c - 34d is -1.

It is defined as the combination of constants and variables with mathematical operators.

We have an algebraic expression:

= 14a - 72r - c - 34d

From the above equation, the coefficient of the c term is:

= -1

Thus, the coefficient of the c-term of the algebraic expression 14a - 72r - c - 34d is -1.

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[tex]\frac{79}{10}[/tex], which is a complex fraction, can be written as a mixed number resulting in [tex]7\frac{9}{10}[/tex].

A mixed number is a combination of a whole number, a numerator and a denominator.

The numerator is always less than the denominator in a mixed number because it has been converted from a complex fraction to its current status as a mixed number.

Mixed numbers are complex fractions, like [tex]\frac{79}{10}[/tex].  Before the conversion, complex fractions are fractions where the numerator is greater than the denominator.

Thus [tex]\frac{79}{10}[/tex] written as a mixed number is [tex]7\frac{9}{10}[/tex].

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Answer:

127.39 square units

Step-by-step explanation:

We are given;

We are supposed to determine its area;

Circumference = πD or 2πr , where D is the diameter and r is the radius

Thus;

40 = 2πr

πr = 20

 r = 20/π

Area of a circle is given by;

A = πr²

but, r = 20/π

Hence;

Area = π × (20/π)²

        = π × 400/π²

         = 400/π

Taking π to be 3.14

   Area = 400 ÷ 3.14

            = 127.39 square units

Thus, the area of the circle is 127.39 square units

Answer:

You'll need 18 cups of chicken broth!

Step-by-step explanation:

You are using a ratio of 1/4 cup (lentils) to 2 cup (broth). Therefore, you need to find the relationship between lentil and broth.

Therefore, 18 cups are needed :D

To make a soup with 2 1/4 cups of dried lentils, you would need 9 cups of chicken broth.

To find the number of cups of chicken broth needed, we need to multiply the given number of cups of dried lentils (2 1/4 cups) by the ratio of chicken broth to dried lentils. The ratio is 2 cups of chicken broth per 1/4 cup of dried lentils. So, for 2 1/4 cups of dried lentils, we would need:

2 1/4 cups × (2 cups/1/4 cup) = 9 cups of chicken broth

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Answer: Estimate means a close guess.

For example, when estimating with decimals, we would round them to the nearest whole number to estimate the answer.

Example: 3.6 + 1.2

1.2 is closest to 1

3.6 is closes to 4

4 + 1 = 5

A good estimate is 5

3.6 + 1.2 = 4.8

4.8 is very close to 5, so 5 is a very good estimate.

Final answer:

Estimating a math problem involves making an educated approximation of a quantity using prior knowledge and reasoning. It applies to various fields and helps to rule out unrealistic numbers, as well as develop important problem-solving skills.

Explanation:

To estimate a math problem means to find a rough approximation or a ballpark figure of the quantity in question, rather than calculating the exact number. Estimations are based on sound reasoning, prior experience, and a strong grasp of the relevant variables and physical principles. The process is not a wild guess but a calculated approximation that can be derived from formulas where the input quantities are known to a limited precision.

For example, to estimate the mean rent for a two-bedroom apartment in a town, you might calculate the average of several listed rents. Or, in physics, to estimate how large a current will be in a circuit when it is turned on, you would apply the relevant principles and any known quantities to arrive at an approximate value. The goal of estimation is to get within a reasonable range of accuracy without needing a precise computation.

The skills of estimation are vital in many fields, including physics, and they help in ruling out unrealistic results. Practicing these skills, getting familiar with units, and understanding relationships between variables all contribute to making better estimates. Moreover, after arriving at an estimate, it's important to do a sanity check to make sure the result seems reasonable within the context of what is known.

Answer:

C i think..

Step-by-step explanation:

Answer:

625

Step-by-step explanation:

We have to find 125% of 500

 = [tex]\frac{125}{100} * 500 = 1 .25 * 500[/tex]  = 625 .

Here the solution (625) is greater than the original (500) because the percentage value is more than 100% . so the answer will come more than its original value.