A bag contains 6 red marbles, 2 white marbles, and 1 gray marble.You randomly pick out a marble,record its color,and put it back in the bag. You repeat this process 45 times. How many white or gray marbles do you expect to get ?

Answers

Answer 1

Answer: You should expect 5. There is one grey marble out of 9 total, and that can be expressed as 1/9. Since you repeat it 45 times, it's 1/9 45 times, or 1/9(45).

$(1)/(9) * (45)/(1)$

1*45 is 45

9*1 is 9.

45/9 is 5.

Be sure to choose which answer is Brainliest!

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The bird house in your friend's yard casts a shadow that is 14 feet long. Your friend is 5 feet tall and casts a shadow that is 3.5 feet long. What is the height of the bird house?

Jennifer has a total of 8/9 square yard of fabric to use for making handkerchief. Each handkerchief requires 1/6 square yard of fabric. Part A How many complete scarves can she make with the material she has? Part B How much of a scarf, if any, is left over?

Answers

8/9 = 48/54
1/6 = 9 /54

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Kevin uses 84 fluid ounces of water to make an all purpose cleaner the directions call for 4 fluid ounces of concentrated soap for every 3 cups of water how many fluid ounces of soap should he use? ( 1 cup=8 fl oz)

Answers

Answer: He should use 14 fluid ounces of soap.

Step-by-step explanation:

1. You need to make the conversion from cups to ounces.

You know that:

$1\ cup = 8\ fluid\ ounce$

Then:

$(3\ cups)((8\ fluid\ ounce)/(1\ cup))=24\ fluid\ ounce$

2. According to the information given in the exercise, Kevin must use 4 fluid ounces of concentrated soap for every 3 cups of water or 24 fluid ounces of water.

Then, knowing that he uses 84 fluid ounces of water to make an all-purpose cleaner, you can set up the following proportion:

$(4)/(24)=(x)/(84)$

Where "x" is the total fluid ounces of soap that Kevin should use.

3. Solving for "x", you get this result:

$(84)((4)/(24))=x\n\nx=14$

A 13-ounce package of pistachios costs $5.99. What's the unit rate?

Answers

we know that

A rate is a ratio that compares quantities in different units. A unit rate is a rate where the second quantity is one unit

In this problem to find the unit rate

Divide $ $5.99$ by $13\ ounces$

$unit\ rate=(5.99)/(13)(dollars)/(ounce) \n \n unit\ rate=0.46(dollars)/(ounce)$

therefore

the answer is

the unit rate is equal to $0.46(dollars)/(ounce)$

The unit rate is $0.46 per ounce because $5.99/13oz=$0.46/oz.

Please if you get any of these, please help!

Answers

Hey try and use Socratic or photomath they have really helped me

Thirty copies of a textbook weigh a total of 75 lb. What is the weigh of each book?

Answers

Answer: Each book weighs 2.5 pounds.

Step-by-step explanation: 75 divided by 2.5 is 30. Or you could also get the answer by multiplying 30 and 2.5 which it would be 75. So, therefor, the answer is 2.5.

Final answer:

To find the weight of each textbook, we divide the total weight by the number of books. Therefore, each book weighs 2.5 lb.

Explanation:

If thirty copies of a textbook weigh a total of 75 lb, to find the weight of each individual book, we need divide the total weight by the number of books.

Here is a step-by-step explanation of the solution:

Determine the total weight of the textbooks, which is 75 lb.
Determine the number of books, which is 30.
Divide the total weight by the number of books. So, 75 lb ÷ 30 = 2.5 lb.

Therefore, each book weighs 2.5 lb.

Learn more about Weight of textbooks here:

brainly.com/question/32068424

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What is the answer to -4/5 + 3/20 =

Answers

$- (4)/(5) + (3)/(20)$

First, find the LCD of the two denominators.
Multiples of 5: 5, 10, 15, 20
Multiples of 20: 20
The LCD is 20.
Second, make the denominators the same as the LCD. / Your problem should look like: $-(4x4)/(5x4) + (3)/(20)$
Third, simplify so that the denominators are the same. / Your problem should look like: $- (16)/(20) + (3)/(20)$
Fourth, combine the denominators. / Your problem should look like: $(-16+3)/(20)$
Fifth, simplify. / Your problem should look like: $-(13)/(20)$

Answer as fraction: $- (13)/(20)$
Answer as decimal: -0.65

The answer to your question is: -4/5 + 3/20 = -0.65

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