Mathematics Middle School

The social studies teacher wants to know whether the students in the entire school prefer a model United Nations activity or a student government activity. The teacher draws a random sample from the following groups:

All teachers in the school
All boys in each grade
All students in each grade
All students in the social studies club
Which group best represents the population he should take a random sample from to get the best results for his survey?


All teachers in the school
All boys in each grade
All students in each grade
All students in the social studies club

Answers

Answer 1
that would be number 3 on the list; All students in each grade
Answer 2

Answer:

All students in each grade.

Step-by-step explanation: This is the answer that givs the most variablity. Your welx if its correct :)

Related Questions

Please help offering All my pts and brainliest answer


(06.02 LC)Which of the following algebraic expressions can be used to express the statement "one less than x squared?"

1 − x2

x2 − 1

1 − 2x

2x − 1

Answers

x2-1 I think that's the answer because there's 1 less, 1 take away the x and squared!! hard to explain but that's how I thought about it

Algebraic expression can be used to express the statement one less than x squared is option (B) [tex]x^{2} -1[/tex]

What is Algebraic expression?

In mathematics, an algebraic expression is an expression built up from integer constants, variables, and the algebraic operations.

Given,

one less than x squared is

[tex]x^{2} -1[/tex]

Hence, the algebraic expression can be used to express the statement one less than x squared is option (B) [tex]x^{2} -1[/tex]

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What is the median value of the data set shown on the line plot?

Answers

If there is an odd number of observations, the median is the middle one, if we order the observations in increasing order. If the number is even, then we take the mean of the two middle ones. Here, we see that we have in total 22 observations, so we take the mean of the 11th and 12th observation. We have that 9 observations are below 6. Then, the 10th until the 13th observation is 6. Hence, we have that the median is [tex] \frac{6+6}{2} =6[/tex].

The answer is 6. I'm just adding this to help anyone else struggling with this quiz.

In the figure, point B is the midpoint of AC. Use the figure to answer the questions.

(a) Jeremy says that ABD is congruent to CBD by the SAS congruence postulate. Do you agree or disagree? Explain.


(b) Suppose it is also known that AD is congruent to CD. Which postulate or theorem can be used to prove that ABD is congruent to CBD? Justify your answer.

Answers

Answer:

A is true

B = SSS OR RHS

Step-by-step explanation:

bcoz both can be applied here

Jeremy's statement that triangle ABD is congruent to triangle CBD by the SAS congruence postulate is incorrect.

If we are also given that AD is congruent to CD, then we can use the SSS congruence postulate to prove that triangle ABD is congruent to triangle CBD.

Answer to part (a)

I disagree with Jeremy's statement that triangle ABD is congruent to triangle CBD by the SAS congruence postulate.

The SAS congruence postulate states that two triangles are congruent if they have two pairs of corresponding sides congruent and the included angle congruent.

In this case, we have two pairs of corresponding sides congruent (AB = BC and AD = CD, since B is the midpoint of AC). However, we are not given that the included angle (angle ABD) is congruent to angle CBD.

Therefore, we cannot use the SAS congruence postulate to prove that triangle ABD is congruent to triangle CBD.

Answer to part (b)

If we are also given that AD is congruent to CD, then we can use the SSS congruence postulate to prove that triangle ABD is congruent to triangle CBD.

The SSS congruence postulate states that two triangles are congruent if they have three pairs of corresponding sides congruent.

In this case, we have three pairs of corresponding sides congruent (AB = BC, AD = CD, and BD = BD). Therefore, we can use the SSS congruence postulate to prove that triangle ABD is congruent to triangle CBD.

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Each side of the square below is 20 centimeters. The area of the circle inside the square is about 314 square centimeters.

a.43/200
b.43/157
c.157/200
d.200/157

Answers

Maybe divide each number until you get 20?

Answer:

It would be 157/200

Step-by-step explanation:

The gent in the comments


Victor Hernandez has a credit card that bases its finance charge on the average-daily-balance method-new purchases included. His monthly periodic rate is 2.9% and his finance charge for the most recent billing cycle was $37. Find his average daily balance.

Answers

We can find the average daily balance of Victor's credit card by using a proportion. Proportions may be used to find missing values in times when we have percentages. The proportion compares two fractions and both sides equal the same amount (that's how we'll know we got the correct answer). The proportion will be written as such: [tex] \frac{is}{of} [/tex] = [tex] \frac{percent}{100} [/tex] . To fill in the blanks, we know our "is" is 37. That is the part of the whole that we are looking for, the "of". Our percent is 2.9, and that goes over 100. To solve. we cross multiply 100 x 37, which gives us 3700. Last, we divide by 2.9. After dividing our final answer is 1,275.86. This means that Victor's average daily balance is is $1,275.86.

1/ 4 of a pizza is split equally between 3 sisters. How much of a whole pizza will each sister get?

Answers

i think it is 1/12 of the pizza
you divide 1/4 by 3 which is 1/12

which translation maps the graph of the function f(x)=x^2 onto the function g(x)=x^2-6x+6

Answers

write x²-6x+6 into vertex form by completing a perfect square:
x²-6x+9+6-9=(x-3)²-3
compared with f(x)=x², g(x)=(x-3)²-3 is shifted three units to the right and three units down. 

Answer:

Translation from (0,0) to (3,-3), 3 units down, and 3 units to the right.

Step-by-step explanation:

The Geometric Transformation called Translation of this parabola f(x)=x² is obtained, firstly by shifting it down 3 units simply adding -3 units as the independent term.

The Translation of the Parabola is counted by its vertex. y=x² (0,0) to y=x²-6x+6 (3,-3).

Algebraically:

So, f(x)=x² -3

Looking at g(x)=x²-6x+6, we still need to make it down after the curve intercept y-axis. b<0

Then, let's shift it three units to the right so its vertex hit the point 6, as y-coordinate, we have to add -3. If we want to add to the right sum negative value, then square it:

y= (x-3)²-3

y=x²-6x+9-3

y=x²-6x+6

Explain one relationship between capacity and fluid ounces

Answers

1 US gallon = 128 fluid ounces

What is the equation of the line in slope-intercept form?

[ fill in the spaces ]
y=___x+___

Answers

y=5/2x+5 because the slope is 5/2 and the y-intercept is 5

Which of the following represents the most accurate estimation of 375+147

Answers

375+147=522
rounded to the nearest hundred is 500

which equation represents the pattern in the table below?

[tex]s = c + 4[/tex]
[tex]s = 4c[/tex]
[tex]c = s + 4[/tex]
[tex]c = 4s[/tex]

Answers

The answer is C=S+4 Because both S and C have the same rate of change you only need to find the difference of the two values.

Answer:

[tex]c=s+4[/tex]

Step-by-step explanation:

We are given that a pattern in the table

We have to find which equation represents the pattern in the table.

Sail=3

Carrie's age=7

Let s be the sale's and c be the carrie's age

Sail=3

Carrie's age=7

Carrie's age=3+4

Sail=5

Carrie's age=9

Carrie's age=5+4

Sail=8

Carrie's age=12=8+4

Sail=13

Carrie's age=13+4

Sail=15

Carrie's age=19=15+4

Hence, [tex]C=S+4[/tex] is an equation which represents the pattern in the table.

Answer:[tex]c=s+4[/tex]

I need help simplifying this: √289

Answers

the answer is 17 hoped this helped 

HELP EXPERTS AND GENIUSES PLS HELP

What is the best approximation for the circumference of a circle with a radius of 45 cm?

Use 3.14 to approximate pi.

1:70.65 cm
2:141.3 cm
3:282.6 cm
4:6358.5 cm

Answers

45 * 2 = 90
90 x 3.14 = 282.6 cm

 answer is: 3:282.6 cm

Answer:

282.6

Step-by-step explanation:

How to do this cause I am confused

Answers

The answer is:  " 268.666 in² " .
______________________________________________________
Explanation:
_____________________________________________________
Formula for area of circle (shape of pizza):
______________________________________________________

A = [tex] \pi [/tex] * r²  ;

in which:  "A = area of the pizza (area of a circle)" ; for which we are to solve.

                "[tex] \pi [/tex]" = 3.14 (approximation we shall use) ; 

                r = radius = "d/2" ; d = diameter = 18.5 in (given) ; 

                r = d/2 = (18.5 in. / 2) = 9.25 in.
_______________________________________________
Plug our known values into the formula to solve for "A" (area):

A = [tex] \pi [/tex] * r² ;

   = (3.14) * (9.25 in)² ;

   = (3.14) * (9.25)² * (in²) ;

   = (3.14) * (85.5625) * (in²) ;

   =  268.66625 in² ;
_________________________________________
Round to:  " 268.666 in² " .
_________________________________________

A meteor crater is 3900 feet in diameter. Approximate the distance around the crater. Use 3.14 for π.

Answers

You’re looking for the *circumference* of the crater. The definition of π is the ratio of the circumference of the circle to its diameter, or mathematically:

π = c/d

Which means that c = dπ. Our diameter is 3900 ft, which mean that our circumference is 3900π ft, or, using 3.14 as π, 3900(3.14) = 12,246 ft.

PLZ HELP FAST!!!!!!!
The triangles are similar. The area of the larger triangle is 729 cm².


What is the area of the smaller triangle?
10.5 cm²
31.5 cm²
67 cm²
81 cm²

Answers

Corresponding sides have a ratio of 18/54 = 1/3. Thus the area will have a ratio of (1/3)^2 = 1/9.

The smaller triangle has an area of
.. (1/9)*729 cm^2 = 81 cm^2 . . . . . . . . . . . . . . corresponds to the 4th selection

Quadrilateral ACEG≅Quadrilateral NMRP Which statement is true?
A:
EG≅MN
B:AC≅MR
C: AG≅NP
D:CE≅NP
pls help

Answers

Final answer:

The true statement given that quadrilateral ACEG is congruent to quadrilateral NMRP is D: CE≡NP, which matches the corresponding sides based on the order of the vertices in the name of each quadrilateral following CPCTC.

Explanation:

If quadrilateral ACEG is congruent to quadrilateral NMRP, then corresponding parts of congruent polygons are congruent as well. This principle is often abbreviated as CPCTC (Corresponding Parts of Congruent Triangles are Congruent). Applying this rule, we need to match each vertex of quadrilateral ACEG to the corresponding vertex of quadrilateral NMRP.

To determine which statement is true, we need to compare the corresponding parts:

EG≡MN: This would be true if G corresponded to N and E to M, which would make EG and MN opposite sides.AC≡MR: This would imply that A corresponds to M and C to R, which are not opposite each other based on the naming of the quadrilaterals. This is not correct.AG≡NP: For this to be true, A would have to correspond to N and G to P. But again, A and G are not opposite vertices so this can't be true.CE≡NP: If C corresponds to N and E corresponds to P, then CE and NP would be equivalent and therefore congruent. Since there are four sides, the connecting letter should signify that C corresponds to N, and E to P, making this the correct correspondence.

Hence, the correct statement based on the information given and the application of CPCTC is D: CE≡NP.

What is the circumference of a circle with a radius of 6.1 centimeters?

Enter your answer as a decimal in the box. Use 3.14 for pi. Round your answer to the nearest tenth.
cm
please help

Answers

The answer is 38.308.
Circumference is diameter times pi.
Times 6.1 times 2 to get 12.2
12.2 times 3.14 is 38.308
Hope this helps☺
 You need to use the formula radius*2 x pi. Radius*2 = 12.2, pi = 3.14, so the answer would be 38.308

The first person who answers correctly gets thanks and braniy!

1. The figures shown are similar. What is the scale factor? [Image one]


2. The figures shown are similar. What is the scale factor? [Image 2]


Answers

That arrow helps a lot.
One
Scale factor = 21/14 = (3*7)/(2*7) = 3/2 the sevens cancel out.

Two
Scale factor = 24/18 = (6 *4) / (6 * 3) The 6s cancel out 
Scale factor = 4/3

Gabe filled 5 glasses of the same size with ice tea from a full 64-ounce pitcher. There were 3 ounces left in the pitcher. Which equation and solution give the number of ounces, s, in each glass?

Answers

Answer:

The number of ounces in each glass is [tex]12.2\ ounces[/tex]

Step-by-step explanation:

Let

s-------> the number of ounces in each glass

we know that

To get the number of ounces in each glass, subtract the amount of tea left in the pitcher from the total amount of tea and divide the result by the number of glasses.

so

The equation that represent the situation is

[tex]s=(64-3)/5[/tex]

[tex]s=(61)/5=12.2\ ounces[/tex]

Answer:

Step-by-step explanation:

Please help!!!

What sum of money will yield a simple interest of Rs.1155 in 3 years 6 months at 11% per annum .

Answers

Answer:

Rs.833.94

Step-by-step explanation:

To solve for the sum of money or principal, we use the formula:

[tex]P=\dfrac{A}{1+rt}[/tex]

The current variables we have are:

A = Rs.1,155

r = 11% or 0.11

t = 3.5

Now let's plug the variables into the formula.

[tex]P=\dfrac{A}{1+rt}[/tex]

[tex]P=\dfrac{1,155}{1+(0.11)(3.5)}[/tex]

[tex]P=\dfrac{1,155}{1+0.385}[/tex]

[tex]P=\dfrac{1,155}{1.385}[/tex]

[tex]P=Rs.833.94[/tex]

Michaela caught 3 fish, which weigh a total 19 1/2 pounds. One fish weighs 7 5/8 pounds and another weighs 5 3/4 pounds. How much does the third fish weigh?

Answers

Find a common denominator for 2,4,8. Which is 8. Change the fractions to new ones.

1) 19 4/8= 156/8 Then add the second. 2) 7 5/8= 61/8 one and the third
3) 5 6/8= 46/8 one. Which is

15/8. Then, subtract your answer and the first one. You get 141. Simplify. 17 5/8

6 and 1/8. Tell me if you would like to see my equation.

A navigator plots the course a plane is currently traveling. The plane is 300 miles from its destination. If it continues on its current course it will travel 325 miles and end up 125 miles due south of its destination. To the nearest degree, how many degrees is the plane off course?

Answers

We have to use the rule of cosx° to solve this problem. Attached is a diagram of the navigator's course for the plane. It is similar to the shape of a triangle. We know the plane is 300 miles from its destination, so that will be one of the sides. On the current course, it is 325 miles from its destination, so that will be another one of the sides. The last side is 125 because that is the distance between the destination and the anticipated arrival. Cosx° is what we are looking for. 

To find how many degrees off course the plane is, we must use the rules of Cosx°, which is shown in the attached image. 

The plane is approximately 23° off course. 
Final answer:

The plane in question is approximately 23 degrees off course. This calculation is derived from the tangent function in trigonometry based on the distances given.

Explanation:

From the question, we understand that the plane is creating a right triangle due to its off-course direction. Using the Pythagorean theorem, the length of the hypotenuse, or the distance that the plane will travel, is 325 miles. The difference between the direct route (300 miles) and the off-course southern distance (125 miles) forms the two other sides of the triangle.

However, we're looking for the angle, not the sides. This is where trigonometry comes in. Specifically, the tangent function will be valuable here as it involves the opposite and adjacent sides of a right triangle (the off-course southern distance and the direct route distance). If we let the 'off-course' angle be θ, then we have:

Tan(θ) = (distance south / direct distance) = (125 miles / 300 miles)

In order to find the angle θ from this equation, we'll need to use the inverse tangent function.

θ = atan(125/300) = 22.61986495 degrees.

Therefore, to the nearest degree, the plane is approximately 23 degrees off course.

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Which orderer pair can be removed so that the resulting graph represents a function? (-2,2) (1,3) (5,-4) or (-4,-4)

Answers

you don't have to remove any because all x values are the not same.

It will be B. (1,3)

Hope this helps!

Justin drove at a steady speed of 60 miles/hour. Write an equation to represent the relationship between the total distance Justin drove, 'd', in a certain amount of time, 't'. Which value is the dependent variable? Which is the dependent variable? Which is the independent variable? Explain.

Answers

60t=d

The dependent variable is t because it has a coefficient (number next to it)
The independent variable is d because it does not have a coefficient and it is the product/answer.

Answer:

60d+t=

Step-by-step explanation:

what the answer

find the measures of the numbered angles in each figure

Answers

1 is 90o
2 is 90 - 27 = 63
3  63 angles 2 and 3 are in an isosceles triangle. They are opposite equal sides so the angles are equal.

how much should Lauren, earning 7.80 an hour, make working a 44-hour week?

Answers

Answer:

343.2

Step-by-step explanation:

7.8*44=343.2

Help with this question please!!

Answers

The first one is an answer because it simplifies to:
[tex]3(6x) = 18x[/tex]

The third one is answer because it simplifies to:
[tex]2x(9) = 18x[/tex]

Those are all your answers: Option 1 and Option 2.

A trapezoid has an area of 24 square meters. The length of the bases of the trapezoid are 5 meters and 7 meters. What is the height of the trapezoid?

Answers

As with any formula, fill in the values you know and solve for the one you don't know.

A = (b1 +b2)/2*h
24 m^2 = (5 m +7 m)/2 * h
24 m^2 = (6 m) * h
(24 m^2)/(6 m) = h
4 m = h

The height of the trapezoid is 4 meters.

What is the area, in square feet, of the shaded region?
What is the area, in square feet, of the nonshaded region?

Answers

Draw a line going from the intersection of the 2 foot line going up and the 2 foot line going across. Draw this line so it is parallel to the 16 foot line at the bottom.

The orange figure is now cut into 2 pieces. The bottom piece is a rectangle and the top piece is a trapezoid.

Trapezoid
========
The area of a trapezoid = (a + b)*h/2; a and b are the parallel lines. h = 2 + 8 = 10 feet
a = 1
b = 8 - 2 -2 = 4 feet. You are going to have to draw the diagram carefully to get this answer.
a is on the right side of the trapezoid. b is on the left side.
h = 8 + 2 = 10 feet

Area = (1 +4)*10/2 =25 square feet.

Rectangle
=======
L= 8 feet
w = 2 feet
A = L * w
Area= 2 *8 = 16 square feet.

Total Area Orange
==============
Area = 16 + 25 = 41 square feet

Area of the Black Area 
=================
Area = L*W - 41 Square feet
Area =16 *8 - 41 = 87 square feet

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