Mathematics Middle School

A bag contains a total of 25 marbles. Five of the marbles are blue, 3 are red, 8 are green, and 9 are white. If a marble is drawn from the bag and then replaced 50 times, about how many times would a green marble be drawn?
A. 4
B. 8
C. 16
D. 24

Answers

Answer 1
There is an 8/25 chance of drawing a green marble, and since the marbles aee being drawn 50 times, then you have to muliply 8 by 2 to get 16/50. Since the marble is replaced after it’s drawn, the chances of drawing a green marble stay the same with each new pick, so 16/50 probability means that about 16 marbles will be drawn. (C)

Related Questions

If the sum of three numbers is 144, what is the average of the three numbers?

Answers

 For 33, add consecutive odd numbers until the sum is greater than 33: 3 + 5 ... more efficient and which (if used properly) find all the answers for a given "n". ... 33 as the sum of 3 consecutive odd integers whose average is 11.

What does volume mean

Answers

Volume is the amount of space inside a solid figure like a ball or a cube ect.

Hope this Helps!!
Volume is the amount of space an object has

Native Americans once lived near Cartersville, Georgia, in an area that is now a state park. They constructed burial mounds that often contained artifacts, such as beads, feathers, and copper ear ornaments. One of the park's mounds is 63 feet in height. Be a Math Detective. If the top of the mound is rectangular in shape with a perimeter of 322 yards, what could be the side lengths of the rectangle?

Answers

Final answer:

The sides of the rectangle atop of the mound could be multiple pairs of measurements. One such possible example is 100 yards by 61 yards which satisfy the perimeter equation, given the perimeter of the rectangle is 322 yards.

Explanation:

The question is asking about the side lengths of the rectangular top of an ancient mound in Cartersville, Georgia. This is a math problem that uses the concept of perimeter.

The perimeter of a rectangle is given by the formula: P = 2l + 2w where P is the perimeter, l is the length, and w is the width. We know that the perimeter of the rectangle is 322 yards. We can solve for the sides (length and width) by setting up equations using various combinations of numbers that, when plugged into the formula, result in a sum of 322.

It's important to note that we won't have a unique solution to this because a rectangle's perimeter doesn't determine its side lengths uniquely, but only within certain limits. So, there could be multiple correct answers.

For example, if we consider the length to be 161 yards, and the width to be 0 yards, it would still satisfy the perimeter equation. But since width cannot be zero, we can suppose the length to be longer side and width to be smaller, say 100 yards and 61 yards, which also add up to produce a perimeter of 322 yards. So, one possible solution is 100 yards by 61 yards.

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He counted 206 wheels and 170 pedals. How many bicycles and tricycles does he have.

Answers

bicycle has 2 wheels and 2 pedals
 tricycle has 3 wheels and 2 pedals

EQ 1 : 2b + 2t = 170 pedals

 EQ 2: 2b +3t = 206 wheels

subtract  EQ 1 from EQ 2

2b +3t = 206 - 2b + 2t = 170 = t=36

 there were 36 tricycles

36 x 2 = 72 pedals

170 pedals - 72 = 98 pedals left
98/2 = 49 bicycles

36 Tricycles and 49 bicycles




Cody and Ashley are helping their dad fertilize the lawn. They have 3 1/3 pounds of fertilizer and 3 buckets. Each bucket will get the same amount of fertilizer. Cody measures 1 pound of fertilizer into each bucket. The following equation represents this situation, where x represents the additional amount of fertilizer each bucket will get. 3 (x+1) = 3 1/3

How much more fertilizer should each bucket get?
A. 1/9 of a pound
B. 2/3 of a pound
C. 2/9 of a pound
D. 1/3 of a pound

Answers

I believe your answer is A, one-ninth of a pound.

Answer:

1/9 pound

Step-by-step explanation:

Haley has some cubes each cube has a side length of 4 inches what is the volume in cubic inches of each cube

Answers

Volume of a cube is a^3 so 4^3=64in^3
the formula for Volume is
V=s*s*s
where s represents a side
so...
V=4in.*4in.*4in.
4*4*4=64
V=64 in. cubed

Andrew ran 4 laps on Sunday and 2.2 laps on Saturday. If each lap is 1.5 miles, how far did Andrew run last weekend?

Answers

4 x 1.5 + 2.2 x 1.5 = 12.3

rectangle A is 15cm long. rectangle B is 40cm long and its width is 8 less than rectangle A. The area of Rectangle B is double Rectangle A. what is the width of Rectangle B?

Answers

The width is 24. 

You can get this by setting the rectangle A width to x and the rectangle B width to x - 24. Then set the area of A multiplied by 2 equal to the area of B. You can then solve for x. 

there are a total of 122 countries in Africa, Europe, and North America. Europe has twice as many countries as North America, and Africa has seven more than Europe. How many countries are in each continent? write an equation and solve it to answer the question

Answers

E = 2N

A = E +  7 = 2n + 7

n + 2n + 2n +7 = 122

Y = 2x - 1 and y = x + 3 find the solution by graphing or substitution

1. ( 4,7)
2. ( 7,4)
3. ( -7,-4)
4. Infinite solutions

Answers

The answer is the 3rd one

Answer:

Ripboodap9urmy you are wrong utterly wrong. I had a feeling you were guessing why would you say it's the third choice out of the blue

Step-by-step explanation:

And person who's asking this believe me it is (4,7) I ligit just took the test and got it correct and it's the first choice.

Plzz give me brainlist!!

simplified form of the expression (5.23x + 3.76) − (3.67x − 6.39)

Answers


[tex]5.23x + 3.76 - 3.67x + 6.39 \\ = 1.56x + 10.15[/tex]

Answer:

1.56x + 10.15

Step-by-step explanation:

(5.23x + 3.76) – (3.67x – 6.39)

(a + b) – (c – d) = a + b – c + d

Remove the parentheses and change the signs as needed:

5.23x + 3.76 – 3.67x + 6.39.

Group the like terms and simplify:

5.23x – 3.67x + 3.76 + 6.39

1.56x +10.15.

The simplified form of (5.23x + 3.76) – (3.67x – 6.39) is 1.56x + 10.15.

16a^2+21a+9=6a^2 solve the equation for all real solutions

Answers

a= -3/5
or
a= -3/2
No problem!
The answers are a1= -3/2 and a2= -3/5

∠YXZ and ∠ZXW are adjacent and supplementary angles. If m∠YXZ = 37°, what is m∠ZXW?

A. 143°
B. 37°
C. 53°
D. unknown

Answers

Answer: Choice A) 143 degrees

To get this answer quickly, you subtract the given angle (37) from 180 to get 180-37 = 143

The more longer answer would look something like this
x+37 = 180 .... the two supplementary angles add to 180 degrees
x+37-37 = 180-37 .... subtract 37 from both sides
x+0 = 143
x = 143
where x is the measure of angle ZXW

the difference between the product of 6 and a number and negative two times the number

Answers

Will equal 8 times that same number. This is because you have 6x and are subtracting -2x. Subtracting a negative is like adding a positive. 


What is the equation for the sum of three consecutive even numbers totaling 198.

Question 4 options:

n+n+1+n+2=198

n+n+2+n+4=198

3n=198

n+3=198

Answers

Let the first number be represented by x.  Then the next is x+2, the next x+4.  Add these 3 expressions together and equate the sum to 198.

Final answer:

Option B: n+n+2+n+4=198

The equation for the sum of three consecutive even numbers totaling 198 can be represented as

n + (n+2) + (n+4) = 198,

where n is the first even number.

Solving the equation, the first even number is 64, and the consecutive even numbers are 66 and 68.

Explanation:

The equation for the sum of three consecutive even numbers can be represented as n + (n+2) + (n+4) = 198, where 'n' is the first even number. Let's solve the equation:

Combine like terms: 3n + 6 = 198Subtract 6 from both sides: 3n = 192Divide both sides by 3: n = 64

So, the first even number is 64, and the consecutive even numbers are 66 and 68.

write the equation 12=3x + 6 in the form ax + b = c with c=12 what are the values of a & b?

Answers

12=3x+6
is effectively c=ax+b
meaning
a is 3
b is 6 and
c is 12
If c = 12,
[tex]ax + b = c \\ 3x + 6 = 12[/tex]

Answer : a = 3, b = 6

Hope this helps. - M

HEEEEEEEEEELLLLLLLLLLLLLLLLLPPPPPPPPPPPPPP PLZZZ

Use the expression 4(8 + 3x) to answer the following:

Part A: Describe the two factors in this expression.

Part B: How many terms are in each factor of this expression?

Part C: What is the coefficient of the variable term?

Answers

Asked and answered elsewhere.
https://brainly.com/question/9954194

The expression 4(8 + 3x) has two factors: the number 4 and the binomial (8 + 3x). The number 4 has one term, and the binomial has two terms (8 and 3x). The coefficient of the variable term 3x is 3.

In response to the question about using the expression 4(8 + 3x), let's break it down.

Part A: Describe the two factors in this expression.

The expression has two factors: the numeral 4 and the parenthetical (8 + 3x).

Part B: How many terms are in each factor of this expression?

The first factor, 4, consists of one term because it is a single number. The second factor, (8 + 3x), consists of two terms: the constant term 8, and the variable term 3x.

Part C: What is the coefficient of the variable term?

The coefficient of the variable term 3x is 3.

What is the associative property

Answers

The associative property is the ability to group certain numbers together in addition/subtraction and multiplication problems because their operations are interchangable. 

Example 1: 

1 + 2 + 3

We can solve this by first doing 1 + 2 = 3, and then adding 3 + 3 = 6. OR we can start with 2 + 3 = 5, and add 5 + 1 = 6. We can even do, 3 + 1 = 4, then add 4 + 2 = 6. Either way, we end up with the same correct answer. 

Example 2:

1 x 2 x 3

Same thing applies to multiplication. We can start by doing 1 x 2 = 2, and then 2 x 3 = 6. OR we can do 2 x 3 = 6, then 6 x 1 = 6. Just like the one above, we can also do, 3 x 1 = 3, then 3 x 2 = 6. Either way you group them, you get the same answer. 

Example 3:

- 1 - 2 - 3

We can do - 1 - 2 = - 3, then - 3 - 3 = - 6. OR - 1 - 3 = - 4, then - 4 - 2 = - 6. OR - 2 - 3 = - 5, then - 5 - 1 = - 6. Again, same answer, three different ways to group it.

THIS DOES NOT WORK WHEN THE ADDITION/SUBTRACTION and MULTIPLICATION OPERATIONS ARE IN THE SAME PROBLEM

If given 1 + 3 - 7 x 4, you cannot rearrange the components like you can with the associative property. You will end up with drastically different answer when there is only one way to do this. 

Here is an incorrect example of it. 

1 + 3 + 7 x 4
1 + 10 x 4
11 x 4 
44.

That is wrong. The correct way is 

1 + 3 + 7 x 4
1 + 3 + 28

Now because all of the operations match you can use associative property to arrive at the same answer the three different ways. 

4 + 28 = 32. OR 1 + 31 = 32. OR 29 + 3 = 32. See the difference in the answers? 

can someone please help me?

Answers

Comment
The diameter of the large circle = 3 diameters of the small circle.
The radius of the large circle = 3 radii of the small circles.

Step one
Find the radius of the large circle.
r_small = 5 cm             Given
r_large = 5 * 3 cm        Construction
r_large = 15 cm

Step Two
Find the Area of the large circle
Area = pi * r^2
Area = 3.14 * 15^2
Area = 3.14 * 225
Area = 706.5.

Step Three
Find the area of the 7 small circles.
r = 5 cm               given
pi = 3.14

Area = 3.14 * 5^2
Area = 3.14 * 25
Area = 78.5 cm^2

Area of 1 circle = 78.5 cm^2
Area of 7 circles = x                   Cross multiply
x * 1 = 78.5 cm^2 * 7
x = 549.5 cm^2

Step four
Find the area of the 6 congruent shapes (one of which is shaded). 

Area of the six congruent shapes = area of the large circle - area 7 small circles.

Area of seven large circle  =  706.5 cm^2
Area of 7 small circles        = 549.5 cm^2 Subtract
Area of 6 congruent shapes  157 cm^2

Step 5
Find the area of the shaded area 
6 congruent shapes = 157 cm^2           Cross multiply
1 shaded = x
 
6x = 1 * 157                                           Divide by 6
x = 157 / 6
x = 26.166667 cm^2  <<<<<<<<<<< answer

If your answer is in terms of pi then the answer us

X = 50 pi / 6 or 25 pi / 3   Alternate possibilities.

what is produced in photosynthesis

Answers

Photosynthesis produces glucose from carbon dioxide and water.

Hope this helps!

Answer:

The answer is oxygen and glucose

Step-by-step explanation:

Science man

Susan received grades of 78, 93, 82, and 76 on four math exams. What is the lowest score she can receive on her next math exam and have an average of at least 85 on the five exams?

A) 96
B) 94
C) 92
D) 90
E) 88

Answers

Answers:
Choice A) 96

==========================================

Explanation:

The original list of scores is {78, 93, 82, 76}
Add x to the list to get this new list {78, 93, 82, 76, x}

Let's find the average of the new set
Add up the values and divide by 5. We force this average to be 85 since this is the grade Susan wants
(78+93+82+76+x)/5 = 85
(329+x)/5 = 85
329+x = 85*5
329+x = 425
x = 425-329
x = 96

So if Susan gets a 96 or greater on the fifth test, then she'll have an average of at least 85 (that score or greater)

Find the value of X in the isosceles triangle shown below. How do I find X?

Answers

To get the value of x you need to use the Pythagorean Theorem 
 
a²+b²=c²  →  3²+b²=6.708204² (√45)
                     9 +b² =45.000001
                    -9   ↓   ↓-9
                   ---------------------------
         zero pair   √b² = √36.000001
                           b = 6
One side of the isosceles the x is 6, but we need the whole part so for last you just multiply 6×2= 12 
The answer is......       X=12

Which of the following functions are quadratic functions? (Select all that apply.)
A.f(x) = 2x − 4
B.f(x) = 3 − x2
C.f(x) = 3x2 − x − 6
D.f(x) = 3 x2

Answers

C. because in order for it to be a quadratic the equation has to have a squared value 
(ax2+bx+c)

your mom has to pay two bills. Taxes are $483 and the heating is $230. You want to find out how much total your mom will pay. How can you use skip counting to add these two numbers?

Answers

483 pluse 230 = 713
400 pluse 200 = 600
80 pluse 30 = 110
3 pluse 0 =3
600 pluse 110 pluse 3 equals 713

Three out of four student surveyed in a school said they will vote for nuncio for class president. Predict how many of the 340 students in the school would vote for nuncio?

Answers

3/4 is .75. translate that to percentages, and you get 75%. This means that it is likely that 75% of the 340 students in total will vote for Nuncio. 
write it out:
.75*340
solve:
255

about 255 students are likely to vote for Nuncio
The answer is 255 students. I just multiplied .75 times 340.

Lisa arranges six square paintings as shown in the area of the arrangement is 225 cm² what would it cost Lisa to frame her arrangement at a cost of $.12 per centimeter

Answers

Final answer:

To frame Lisa's arrangement of six square paintings, the total cost would be $43.20.

Explanation:

To find the cost of framing Lisa's arrangement, we need to calculate the perimeter of the arrangement and then multiply it by the cost per centimeter. Since the arrangement consists of six square paintings, we can calculate the side length of one square by taking the square root of the total area of 225 cm². The side length of one square is 15 cm, so the perimeter of one square is 4 multiplied by 15 cm, which is 60 cm. Since there are six squares, the total perimeter of the arrangement is 6 multiplied by 60 cm, which is 360 cm. Finally, we multiply the total perimeter by the cost per centimeter of $.12 to find the total cost of framing, which is 360 cm multiplied by $0.12, equaling $43.20.

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Which is an equation of the given line in standard form?

A. -6x+5y=13
B. -6x+7y=-11
C. -6x+7y=11
D. -7x+6y=-11

Answers

The slope:
[tex]m=\dfrac{y_2-y_1}{x_2-x_1}[/tex]

The coordinates of the points:
[tex](-3;\ -1)\to x_1=-3;\ y_1=-1;\ \left(\dfrac{1}{2};\ 2\right)\to x_2=\dfrac{1}{2};\ y_2=2[/tex]

Substitute:
[tex]m=\dfrac{2-(-1)}{\frac{1}{2}-(-3)}=\dfrac{3}{3\frac{1}{2}}=\dfrac{3}{\frac{7}{2}}=3\cdot\dfrac{2}{7}=\dfrac{6}{7}[/tex]

We have:
[tex]y=\dfrac{6}{7}x+b[/tex]

Substitute the coordinates of the point (-3; -1) to the equation of the line:

[tex]-1=\dfrac{6}{7}\cdot(-3)+b\\\\-1=-\dfrac{18}{7}+b\ \ \ |+\dfrac{18}{7}\\\\b=\dfrac{11}{7}[/tex]

Therefore we have:
[tex]y=\dfrac{6}{7}x+\dfrac{11}{7}\ \ \ |\cdot7\\\\7y=6x+11\ \ \ |-6x\\\\\boxed{-6x+7y=11}[/tex]

Answer: C. -6x + 7y = 11

the drawing is composed of a rectangle and a semicircle 18 cm 22 cm

Answers

What do you need?
The perimeter is L + w + L + perimeter of a semicircle.
L = 22 cm
W = 18 cm
Perimeter can be one of two answers. You need to specify where the semicircle is.  Formula for semicircle is
pi * r
r = 18/2 = 9 or
r = 22/2 = 11
So the perimeter of the semi circle is pi * 9 = 25.12 The total Perimeter = 22 + 22 + 18 + 25.12 = 87.12

It can also be 22 + 18 + 22 + 34.54 = 96.54 There are even more possiblities for perimeter. I would have the same problem if you asked about area.

Why not put more details in and I'l give you the correct answer. Here is what we need to know
1. Where is the circle on the 22 cm side or the 18 cm side?
2. What are you looking for: perimeter or area? As soon as you answer these I'll be back.

 

A recipe for cookies requires 2/3 cup of butter. Rama wants to make 3/4 of the recipe. How many cups of butter should Rama use to make the cookies?

Answers

Multiply the total amount of 2/3 cups by the portion size of 3/4.

= (2/3)(3/4)
multiply numerators; multiply denominators

= (2*3)/(3*4)
= 6/12
simplify by 6

= 1/2 cup


ANSWER: Rama should use 1/2 cup of butter.

Hope this helps! :)

draw an angle measuring 700 degrees in standard position.

Answers

A screenshot of the angle is attached.

700 is almost 2 complete revolutions around the graph.  700-360=340; this means it is the same as going 20° backwards from the starting point.
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