Which of these methods will produce the most representative sample of the student body at Southwest Middle School?

A. The librarian surveys all eighth-grade students.

B. The librarian surveys each student who enters the library one afternoon after school.

C. The librarian surveys each student who is in the library for a math club meeting.

D. The librarian randomly selects homeroom classes and surveys each student in the chosen classes.​

Answer:

a - 3

b - 5

c  -  -2

Step-by-step explanation:

The quadradic formula is:

[tex]x=\frac{-b\pm\sqrt{b^2-4ac} }{2a}[/tex]

When:

[tex]ax^2+bx+c[/tex]

This is the standard form of a quadradic equation.

We have the equation:

[tex]3x^2+5x-2\\\\[/tex]

Recall the standard form.

'3' is in a's place, '5' is in b's place, and '-2' is in c's place.

Hope this helps you.

Answer:do the penny we did this question in class a while ago and u make a lot more then 1 million

Step-by-step explanation:

pretty sure if u do the math its 5 million if theres 30 days in the month

Answer:

hope it will help u in understanding..

if u r able to understand thn mrk it as brainliest.

Answer:

£8934.34

Step-by-step explanation:

[tex]8000 * 1.028^4 = 8934.34[/tex]

rounding to 2dp

if trunctuated at 2dp however, 8934.33

the number is multiplied by 1.028 to the power of four as you go through the equation four times, so it would be the same as

x * n * n * n * n, where it would simplify to x * n^4

Answer:

y=3x+1

Step-by-step explanation:

slope is 3 (up 3 over 1) and y-intercept is 1

Answer:

Los turistas extranjeros fueron 3054 y los turistas nacionales fueron 5646.

Step-by-step explanation:

De acuerdo a la información proporcionada, debes calcular el 35,10% del total de turistas para determinar el número de turistas extranjeros y el 64,9% del total de turistas para encontrar el número de turistas nacionales:

8700*35,10%=3054

8700*64,9%=5646

De acuerdo a esto, la respuesta es que los turistas extranjeros fueron 3054 y los turistas nacionales fueron 5646.

Answer:

A = $ 50,978.44

Step-by-step explanation:

First, convert R percent to r a decimal

r = R/100

r = 5%/100

r = 0.05 per year,

Then, solve our equation for A

A = P(1 + r/n)nt

A = 45,000.00(1 + 0.004166667/12)(12)(2.5)

A = $ 50,978.44

Answer:

the first one is true, the third one is true, the fourth one is true, the fifth one is true

Step-by-step explanation:

the second one is false

Answer:

y = 3x - 8    

Step-by-step explanation:

All the options are written in slope-intercept ( [tex]y = mx + b[/tex]) form. So, what we can do with the given information is write the equation in point-slope form first, then convert it to slope-intercept form.  

1) First, use the point-slope formula [tex]y-y_1 = m (x-x_1)[/tex] to find the point-slope equation of the line. Substitute [tex]m[/tex], [tex]x_1[/tex], and [tex]y_1[/tex] for real values.

Since [tex]m[/tex] represents the slope, substitute 3 in its place. Since [tex]x_1[/tex] and [tex]y_1[/tex] represent the x and y values of one point the line intersects, substitute the x and y values of (5,7) into the appropriate places in the formula as well. This gives the following equation of the line in point-slope form:  

[tex]y-7 = 3(x-5)[/tex]

2) Now, isolate y in the above equation to find its slope-intercept form.

[tex]y-7=3(x-5)\\y-7 = 3x-15\\y = 3x -8[/tex]

Thus, the answer would be the third option as it matches the result we received.

-3/2

slope = rise/run

We can use the two points to calculate rise (y value change) and run (x value change)

slope = (-6)/4 = -3/2

Answer:

11n

Step-by-step explanation:

Answer:

13916.6m^3

Step-by-step explanation:

Answer:

Five rational numbers between 1 and 2 are 11/10, 12/10, 13/10, 14/10, and 15/10.

Answer:

Five rational numbers between 1 and 2 are 11/10, 12/10, 13/10, 14/10, and 15/10.

Step-by-step explanation:

Hope this helps!

Answer:

Yes this is multiplication

Answer is: 105km

Step-by-step explanation:

multiply 3.75 by 28 to find the total number he ran

3.75•28= 105km

hope this helps chu <3

Answer: 20

Step-by-step explanation: to find f, you divide 10 by 0.5 to see what’s left. When you divide it you get 20. To check your work multiply 0.5 by 20 and you’ll see that it equals 10.

Answer:

Wednesday

Step-by-step explanation:

Friday is the day before the day before yesterday

Saturday is the day before yesterday

Sunday is yesterday

Monday is today

Tuesday is tomorrow

Wednesday is the day after tomorrow

Answer:

i cant seem to find ur anwser it seems confusing

Step-by-step explanation:

it is confusing

Step-by-step explanation:

In simplify form: 1.3x+2.4-6.1-3.2 = -4.8x-0.8

or factor the expression: =-4/5×(6x+1) Alternate form: -0.8(6x+1). I hope this helps.

Answer:

13.5

Step-by-step explanation:

4+5 = 9.

9/2 = 4.5

4.5 * 3 = 13.5

Answer:

50 yards because of the roundness of the table

Answer:

x = 79

Step-by-step explanation:

180 - 101 = x

x = 79

Answer:

79 degrees

Step-by-step explanation:

Since the lines are parallel, x is equal to r which is equal to 79 degrees.

Answer:

41.4

Step-by-step explanation:

cos(b) = 12/16

b=arccos(12/16)=41.4 to the nearest tenth

Answer:

41.4° is your answer look it once

Answer:

x = 7.15

Step-by-step explanation:

Taking 33 as the reference angle,

hypotenuse = x

base = 6

Cos 33 = base/hypotenuse

Cos 33 = 6 / x

x = 6/ cos 33

x = 7.15

Answer:

Step-by-step explanation:

-x² + 8x + 20 = b

-x² + 8x + 20 - b = 0

a = -1 ; b = 8 ; c = 20 - b

 There is no real roots.

So, b² - 4ac < 0

Plug in a, b and c values

8²- 4(-1)(20-b) < 0

When we multiply (-1) and (-4), we will get 4

64 + 4(20 - b) < 0

64 + 4*20 - 4b < 0

64 + 80 - 4b < 0

144  - 4b    < 0

Subtract 144 from both sides

-4b < -144

Divide both side by -4 and when we are dividing by (-4), < will change to >

b > -144/-4

b > 36

So, when value of b is greater than 36, the equation will have no real roots.

Answer:

HJ>KJ>HK

Step-by-step explanation:

Side opposite to the largest angle is the largest.

Side opposite to smallest angle is the smallest.

ang K = 118° ang J = 28°

ang K + ang J + ang H = 180° (Sum of all the angles in the triangle is 180°)

118°+28°+angH=180° (Putting the values of ang K & ang J)

146°+angH=180°

ang H=180°-146°

ang H=34°

128°>34°>28°

ang K>ang H>ang J

Here, ang K is the largest, so the side opposite to it i.e. HJ will be the largest side.

Smaller than ang K and bigger than ang J is ang H, so the side opposite to it i.e. KJ will be smaller than HJ but bigger than HK.

Ang J is the smallest angle, so the side opposite to it i.e. HK will be the smallest.

HJ>KJ>HK.

Answer: 1/4

Step-by-step explanation: 3/4-1/2= 1/4

Answer:

not a solution

Step-by-step explanation:

To determine if (1, 4) is a solution to the system

Substitute x = 1, y = 4 into the equations and check validity

y - 2x = 2

y - 2x = 4 - 2(1) = 4 - 2 = 2 = right side ← True

4x - 6 = 4(1) - 6 = 4 - 6 = - 2 ≠ 4 ← False

First equation is satisfied but second is not

Thus (1, 4) is not a solution of the system

Answer:

v

w

x

y

z

Step-by-step explanation:

n..................