Calista conducts a survey to determine the favorite activity of students at her middle school. She asks five seventh-grade girls who are in the school library what they like to do best, and since all of these students answer that their favorite activity is reading, Calista states that the favorite activity of students at her middle school is reading. Explain the flaw in Calista's reasoning. Describe a sampling method that would produce valid information about the favorite activity of students at Calista's middle school.

Answer: (c)

Step-by-step explanation:

Given

The expression is [tex]3x^2-7[/tex]

checking options, for (a)

[tex]\Rightarrow 2x^2-11-x-4\\\Rightarrow 2x^2-x-15[/tex]

option (a) is incorrect

for (b)

[tex]\Rightarrow 5x^2-6-2x^2+1\\\Rightarrow 3x^2-5[/tex]

option(b) is incorrect

for (c)

[tex]\Rightarrow 10x^2-4-7x^2-3\\\Rightarrow 3x^2-7[/tex]

option (c) is matching with the given expression.

Answer:

0.06 liters

Step-by-step explanation:

acid concentration of 65% means that it of 100 units of that solution 65 are acid, and the remaining 35 are water.

so, 100 units are 0.2 liters in this example.

that means that 65/100 × 0.2 = 0.13 liters are acid.

35/100 × 0.2 = 0.07 liters are water

we get a 50% concentration, when we have the same amount of water and acid in the solution (acid is only half of 50% of the solution).

the account of acid remains the same, as we are only adding water.

so, how much water do we need to get from 0.07 liters to 0.13 liters (the same as the already present acid) ?

0.13 - 0.07 = 0.06 liters

Answer:

C

Step-by-step explanation:

(x²)(x³) = x 2+3

6 + (-3)

6 - 3

3

Answer:

the answer is c

Step-by-step explanation:

2 exponent 6 = 64

2 exponent -3 = .125

64x.125 = 8

2 exponent 3 = 2x2x2 = 8

(i don't know how to write exponents on my computer)

Answer:

okay depending on the question

Answer:

I can try

Step-by-step explanation:

9514 1404 393

Answer:

  25°

Step-by-step explanation:

The relevant trig relation is ...

  Sin = Opposite/Hypotenuse

  sin(?) = 25/60

  ? = arcsin(25/60) ≈ 24.62°

The indicated angle is about 25°.

Answer:

Step-by-step explanation:

a) A(t) = 6000 * (1.015)^t

b) 6000 * (1.015)^32 = $9661.94

Answer:

3/6 or 1/2

Step-by-step explanation:

1, 2, 3, 4, 5, 6

3 odd #s and 3 even #s

3/6 are odd which means 3/6 probability of rolling an odd #

Answer:

1/2

Step-by-step explanation:

There are 3 odd numbers 1,3,5 so 3/6 which equals 1/2

:DDDDD

Answer:

The answer is 5 degrees

Step-by-step explanation:

Answer:

y = x+2

Step-by-step explanation:

proportional relationships are of the form

y = kx where k is a constant

y = x is proportional with k=1

y = 2x is proportional with k =2

y = x+2 is linear

Answer:

y = x+2

Step-by-step explanation:

proportional relationships are of the form

y = kx where k is a constant

y = x is proportional with k=1

y = 2x is proportional with k =2

y = x+2 is linear

Answer:

C 16 inches

Step-by-step explanation:

a cylinder is 2 circles (1 on top, 1 at the bottom) and a round "mantle" connecting the two circles.

so, the surface area is the sum of the areas of both circles and the "mantle".

this "mantle" can be cut open and cut off the circles, and then be placed flat on the table. then it is simply a rectangle with the side lengths cylinder height (h) and circle circumference.

circle area : pi × r²

circle circumference : 2 × pi × r

rectangle area :

length × width = circle circumference × h

SA = 659.4 inches² = 2×(pi × r²) + (2×pi×r)×h =

= 2×pi×25 + 2×pi×5×h = 50×pi + 10×pi×h

=> 659.4 - 50×pi = 10×pi×h

=> (659.4 - 50×pi) / (10×pi) = h = 16 inches

the answer is C since it needs to be lees than or -2

Answer:

32

Step-by-step explanation:

[tex](2x+20)+3x=180\\5x+20=180\\5x=180-20=160\\x=160/5=32[/tex]

Answer:

The equation needs to be in standard form

Step-by-step explanation:

The equation needs to be in standard form

so the the coefficients a, b and c can be determined

for use in the quadratic formula

Answer:

Select both Table A and Table B

Step-by-step explanation:

Both Tables show all 3 colors and 2 possible sizes

For proof here is a screenshot of the answer being correct:

Answer:

360

Step-by-step explanation:

Answer:

isosceles triangle

Step-by-step explanation:

isosceles triangles have two equal sides

Answer:

IQR = 3

Step-by-step explanation:

The interquartile range (IQR) is the difference between the upper quartile Q₃ and the lower quartile Q₁

Q₃ is the value at the right side of the box , that is Q₃ = 62.5

Q₁ is the value at the left side of the box. that is Q₁ = 59.5

Then

IQR = Q₃ - Q₁ = 62.5 - 59.5 = 3

Answ

3xmas8

-------------------------------

listo

Answer:

which

Step-by-step explanation:

which one is answer

Answer:

44.8

Step-by-step explanation:

Answer:

Step-by-step explanation:

y=3x^2+12x = 3x (x+4)

zeroes: x={0, -4}

y = x^2+20x+100 = (x+10)^2

zeroes: x = -10 (twice)  

or x={-10, -10}

Answer:

[tex]y=\frac{1}{3}x[/tex]

Step-by-step explanation:

Hi there!

Linear equations are typically organized in slope-intercept form: [tex]y=mx+b[/tex] where m is the slope and b is the y-intercept (the value of y when the line crosses the y-axis)

1) Determine the slope (m)

[tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex] where two points the line passes through are [tex](x_1,y_1)[/tex] and [tex](x_2,y_2)[/tex]

Plug in the given points (-3,-1) and (6,2)

[tex]=\frac{2-(-1)}{6-(-3)}\\=\frac{2+1}{6+3}\\=\frac{3}{9}\\=\frac{1}{3}[/tex]

Therefore, the slope of the line is [tex]\frac{1}{3}[/tex]. Plug this into [tex]y=mx+b[/tex]:

[tex]y=\frac{1}{3}x+b[/tex]

2) Determine the y-intercept (b)

[tex]y=\frac{1}{3}x+b[/tex]

Plug in one of the given points and solve for b

[tex]2=\frac{1}{3}(6)+b\\2=2+b[/tex]

Subtract 2 from both sides to isolate b

[tex]2-2=2+b-2\\0=b[/tex]

Therefore, the y-intercept is equal to 0. Plug this back into [tex]y=\frac{1}{3}x+b[/tex]:

[tex]y=\frac{1}{3}x+0\\y=\frac{1}{3}x[/tex]

I hope this helps!

Answer: [tex]y=-4x-6[/tex]

Step-by-step explanation:

Given

The equation of line is [tex]y=-4x-3[/tex]

The line which is parallel to the given line is [tex]y=-4x+c[/tex]

and shifted by 3 units down i.e. its y-intercept is 3 units below the given line

[tex]\therefore y=-4x-3-3\\\Rightarrow y=-4x-6[/tex]

Answer:

14cm, 16 cm, 18 cm

Step-by-step explanation:

Note that

= a:b: c = 7:8:9

We have to find the sum of the proportion

Sum of proportion = 7 + 8 + 9

= 24

Length of side a

7/24 × 48 = 14 cm

Length of side b

8 /24 × 48 = 16cm

Length of side a

9/24 × 48 = 18 cm

What are the lengths of the sides?

The lengths of the sides of the triangle in cm are

14cm, 16 cm, 18 cm

Answer:

y = 51.32º

Step-by-step explanation:

z = 180 - 47 - 90

z = 43º

sin43 = opp/hyp

sin43 = 35/y

y = 35/sin43

y = 51.32º

Answer:

8 + 6 = 14

14 x 4 = 56

56 x 1/2(basically just dividing by 2) = 28 mm2

Formula of area of a trapezoid:

B1(base 1) + B2(base 2) x H(height) x 1/2(basically just dividing by 2)

In this case, 8 is your base your other base is 6 and your height is 4.

Answer:

Median only

Step-by-step explanation:

I also go to k12 and did this quiz.

sorry if I'm already late

Answer:

Mode :6 Range :5

Step-by-step explanation

To find the mode look for the number that is repeated the most times. And to find the range subtract the greatest number with the smallest number. Hope this helped :)

Step-by-step explanation

The range is the max value minus the minimum value, which would be 8-3, and that equals 5

and the mode is the number that you see the most in a data set, in this case the mode would be 6 since it is the only number that occurs three times

hope this helped

Answer:

nope it isn't a linear function

Step-by-step explanation:

if you put it in a graph it isn't a straight line