suppose a high school guidance counselor wants to find out the proportion of students at his high school who have tried alcohol. he sends out an email to 200 randomly chosen students asking them if they have tried alcohol. of the 92 that responded, 6% said they had tried alcohol. define nonresponse bias. describe how nonresponse might lead to bias in this study.

Answer:

Step-by-step explanation:

You want the discriminant, roots, and graph of the quadratic function ...

 f(x) = 1/2x² -2x +10

The discriminant of the quadratic function

  y = ax² +bx +c

is ...

  d = b² -4ac

The given function has a=1/2, b=-2, c=10, so the discriminant is ...

  d = (-2)² -4(1/2)(10) = 4 -20 = -16

The discriminant of -16 means there will be two distinct complex conjugate roots.

The roots are ...

  x = (-b ±√d)/(2a)

  x = (-(-2) ±√(-16))/(2(1/2)) = 2 ±4i

A graph of the function is attached.

Answer:

x=  -22d/44    x = -48d/44  is your answer

where d =2x  

Step-by-step explanation:

22d²- 35d + 12 = -3d²

22d²- 35d + 12 +3d²

25d²- 35d + 12 = a b c formula= - b-/+ / b^2 - 4 ac   / 2a

= -35d -+/ 35^2 - 4 *22d *12 / 2*22d

= -35d -+/1225d-4 (22) (12) /44d

= -35d -+/1225d- (88) (12) /44d

= -35d -+/1225d- (1056) /44d

= -35d -+/169d-  /44d

=-35d -/+ 13d   /44     x=  -22d/44    x = -48d/44  

The discriminant b2−4ac>0

so, there are two real roots.

Answer:

Step-by-step explanation:

12x^2+17x = 5

12x^2+17x-5 = 0

(4x - 1)(3x+5) = 0

Solve (4x-1) and (3x +5)

4x - 1 = 0

4x = 1

x = 1/4

3x + 5 = 0

3x = -5

x = -5/3

x = { 1/4, -5/3 }

Answer: No, because they are not the same in slope - intercept form

Step-by-step explanation:

    First, we will distribute and simplify into slope-intercept form.

   Equation 1:

y - 3 = 4(x - 2)

y = 4(x - 2) + 3

y = 4x - 8 + 3

y = 4x - 5

   Equation 2:

y + 2 = 4(x + 7)

y = 4(x + 7) - 2

y = 4x + 28 - 2

y = 4x + 26

      We see that the answer to this question is "No, because they are not the same in slope - intercept form" as they have different y-intercepts, one being -5 and one being 26.

Given that WXZ and YXZ are congruent based on side-angle-side congruency, we can prove the theorem that states "A point on the perpendicular bisector of a line segment is equidistant from the segment’s endpoints." This theorem is often referred to as the "Perpendicular Bisector Theorem."

The required details for "Perpendicular Bisector Theorem" in given paragraph

The Perpendicular Bisector Theorem states that if a point is on the perpendicular bisector of a line segment, then it is equidistant from the segment's endpoints. This means that if we draw a line through a point that is perpendicular to a line segment, and that line passes through the midpoint of the segment, then the point is equidistant from the endpoints of the segment. In this case, we are given that line L is the perpendicular bisector of segment WY, and that Z is a point on L. We are also told that WXZ and YXZ are congruent based on side-angle-side congruency. Since WXZ and YXZ are congruent, it follows that WX and YX are congruent and that WZ and YZ are congruent. This means that the distances from Z to W and Y are equal, so Z is equidistant from W and Y.

Therefore, we can conclude that Z is a point on the perpendicular bisector of segment WY, and the Perpendicular Bisector Theorem is proved. The answer is C. "A point on the perpendicular bisector of a line segment is equidistant from the segment’s endpoints."

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The value of the investment after 5 years will be $3309.48.

Compound interest is the addition of interest to the principal sum of a loan or deposit or interest on interest plus interest.

In finance and economics, interest is the payment of an amount above the repayment of the principal sum by a borrower or deposit-taking financial institution to a lender or depositor at a specific rate by a borrower or depositor. It differs from a fee that the borrower may pay to the lender or a third party.

The value of the investment after 5 years will be,

[tex]A = P[(1 + \dfrac{r}{100} )^{nt}]\\A = 2800[(1+0.034)^{5}[/tex]

A = $3309.48

Therefore, the value of the investment after 5 years will be $3309.48.

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There are the some features that make highway roads safer for drivers who are driving at higher rates of speed is :(5 correct answers)

1.Median barriers

2.Guard rails

3.Brake away signs

4.Rumble strips

5.Controlled access

Given,

In the question:

What are some features that make highway roads safer for drivers who are driving at higher rates of speed?

Now, According to the question:

There are the some features that make highway roads safer for drivers who are driving at higher rates of speed is :(5 correct answers)

1.Median barriers

2.Guard rails

3.Brake away signs

4.Rumble strips

5.Controlled access

Hence, There are above 5 highway roads safer for drivers.

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Anna will need 1/2 cup of onions in each pot. This is because 2/3 of a cup is equal to 4/6 of a cup, and when divided by 4 pots, the result is 1/2 cup of onions in each pot.

An ingredient is a substance that is used as part of a recipe or product formulation. Ingredients are the components of a mixture that are used to produce a food, beverage, cosmetic, pharmaceutical, or other product. Ingredients can be natural, such as water, spices, and herbs, or man-made, such as preservatives, colorings, and flavorings. The amount and type of each ingredient used in the formulation of a product determines its properties and characteristics.

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The total flowers in the garden white or pink is 8/15.

The components of a whole or group of items are represented by fractions. A fraction consists of two components. The numerator is the figure at the top of the line. It details the number of equal portions that were taken from the total or collection. The denominator is the figure that appears below the line.

In our garden, there are 2/3 total roses, making the total number of blooms that aren't roses 1/3

4/5 = 2/3 +1/3.

Since 3 is a division of 6, we must multiply by 6 to arrive at the solution.

4 x 6 =24

5 x 6 =30

24/30

Next, we calculate half of 30 and add it to get 3/3.

Then we find 1/2 of 30 and add this to make 3/3

Just like 1/2 of 2 = 1 and 2+1 = 3

30 / 2  = 15

15 + 30 =45

The answer is 24/45

We then reduce this fraction by 3 as 6 + 8 do not divide into 45

24/45 = 8/15

The total flower in the garden is 8/15

The proportion of white or pink flowers in the entire garden is 8/15.

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Answer:

the answer is D. the 3 is simply a scalar multiple so multiply each term by 3

Answer:

D

Step-by-step explanation:

I believe that it's D since all you have to do is multiply 3 by each of the numbers that are supposedly n.

Graph with their Turning Point is shown with different degree of different degree Equation

Where a graph changes, either from increasing to decreasing, or from decreasing to increasing, is called a turning point.

Factorization Technique

The turning point of the parabola lies exactly at the midway between the (two) x-intercepts of a quadratic function, as shown by the fact that a vertical line of symmetry divides the parabola into two equal half and crosses it. In light of this, we can use a factorisation-based method to locate the solution of a quadratic equation. The process involves five steps.

Step 1: By looking at the coefficient of x2, determine if the graph is a minimum or maximum;

Factorize the supplied quadratic function in Step 2 and set it to Zero;

Step 3: Define the function's antecedents;

Take the midpoint of the pair of roots to find the x-coordinate of the turning point in step 4;

2 turning points

Let f(x)=x³+ax²+bx+c, where the coefficients a, b and c are real numbers. The figure below shows a section of the graph of y=f(x). The curve has two distinct turning points; these are located at A and B, as shown.

But there is come limitations in this case too, a function has to follow certain conditions to have two turning points.

3 turning points

If we get 4 roots of any equation it may be containing 3 turning Points.

With some limitations in this as well.

4 turning points

If we get 5 roots of any quadratic equation it may be containing 4 turning points with some limitations in this as well.

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The account’s mean daily balance for April will be $105.7.

Mean is the total added values of all the data in a set divided by the number of data in the set.

The account had the following balances;

$501 for 23 days

$2428 for 3 days

$241 for 4 days.

To find the mean; add the total amount and divide by the total number of days

[tex]mean = \frac{501 + 2428 + 241}{23 + 3 + 4}[/tex]

[tex]mean = \frac{3170}{30}[/tex]

mean = $105.7

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Answer:

Step-by-step explanation:

The measure of base angles and vertex angle are 133° and 47° respectively.

What is an isosceles triangle ?

A triangle with two equal-length sides is known as an isosceles triangle (/assliz/). The term "equilateral triangle" can refer to a shape with either exactly two sides that are the same length or at least two sides that are the same length, with the latter definition containing the equilateral triangle as an exception.

Let the vertex angle to be 'x'

So, according to the question, the measure of the base angels in an isosceles triangle is 8 less than 3 times the measure of a vertex angle

    So, Base angles = (3 × vertex angle) - 8

We know that sum of all angles of a triangle is 180° and the base angles of an isosceles triangle are equal.

∴ Base angles + vertex angle = 180°

  (3 × vertex angle) - 8  + x = 180°

  3x - 8 + x = 180°

  4x = 188°

  x = 47°

∴ The vertex angle is 47° and,

Base angles =  (3 × vertex angle) - 8  

                     = 3 × 47 - 8

                     = 141 - 8

                     = 133°

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Answer If O, P, and Q are collinear points with PQ = 3, and P' and Q' are the images of P and Q under dilation from O with a scale factor of 4, then the length of the segment P'Q' will be 4 times the length of the segment PQ. Since PQ = 3, the length of P'Q' will be 4 * 3 = $\boxed{12}$.

To see why this is the case, recall that a dilation with a scale factor of 4 expands or contracts a figure by a factor of 4 in each direction. In this case, the dilation from O with a scale factor of 4 expands the segment PQ by a factor of 4, resulting in the segment P'Q' with a length of 4 times the length of PQ. Since PQ = 3, the length of P'Q' will be 4 * 3 = 12.

Dangerous, antibiotic resistant bacteria have been observed with increasing frequency over the past several decades.

In this review the factors that have been linked to this phenomenon are addressed. Profiles of bacterial species that are deemed to be particularly concerning at the present time are illustrated. Factors including economic impact, intrinsic and acquired drug resistance, morbidity and mortality rates, and means of infection are taken into account. Synchronously with the waxing of bacterial resistance there has been waning antibiotic development. The approaches that scientists are employing in the pursuit of new antibacterial agents are briefly described. The standings of established antibiotic classes as well as potentially emerging classes are assessed with an emphasis on molecules that have been clinically approved or are in advanced stages of development. Historical perspectives, mechanisms of action and resistance, spectrum of activity, and preeminent members of each class are discussed.

What antibiotic Streptomycin ?

Streptomycin injection is used to treat moderate to severe bacterial infections in many different parts of the body.

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The water tank's illustrated prism will stand 8 meters tall.

Prisms are significant polyhedron family members with congruent polygons at the base and top.

A prism's other faces are referred to as its lateral faces. It denotes that a prism's face is not curved.

The cross-section of a prism is constant along its length. The names of the prisms are determined by their cross-sections. The best example of a prism that best represents a real-world object is a metallic nut.

A rectangular prism that best represents a real-world object is a fish aquarium.

According to our question-

The following formula will be used to determine the triangle prism's base's area:

= 1/2 × 4 × 9

= 18m²

The rectangular tank's water will be drained of the following volume:

= (6 × 6) × 4

= 144m³

As a result, the height will be determined as follows:

18 × h = 144

18h = 144

h = 144/18

h = 8m

Hence, The water tank's illustrated prism will stand 8 meters tall.

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Answer:

The y-intercept of the given line is 7/9.

Step-by-step explanation:

The y-intercept of a line is the point where the line crosses the y-axis.

So, to find the point where the line crosses the y-axis we must do x=0.

By substituting x=0 in the following equation, we get

=> 9y + 4(0) = 7

=> 9y = 7

=> y = 7/9

Hence, y = 7/9 is the y-intercept of the given line.

The solution: is C(g) = 10 + 15g, C'(g) = 80.

Monthly pricing for utilizing 2 Gigabytes of data at Company C.

Detailed explanation:

Company C's cell phone plan is $10 per month + $15 for every gigabyte of data utilized. Company D's monthly fee is $80 and includes unlimited data.

The monthly cost for using g gigabytes of data at Company C is now: C(g) = 10 + 15g.... (1)

Again, the monthly cost for using g gigabytes of data at Company D will be as follows: C'(g) = 80......... (2) (2)

Statement C(2) = 10 + 15 2 = 40 represents Company C's monthly charges for utilizing 2 Gigabytes of data use, according to equation (1).

Thanks for your question. I had an interesting time solving this.

Assuming that costs increase linearly with the number of attendees, Patricia needs at least 30 people to attend the forum in order to break even.

Patricia needs 75 attendees to attend the forum in order to make a profit of 337,500.

By dividing the fixed costs by the contribution margin per unit, we are able to determine the break-even threshold in units. Divide the fixed costs by the contribution margin ratio to get the break-even threshold in dollars.

The percentage of the contribution margin to the sales revenue is known as the contribution margin ratio. Prior to the division operation, we add

the profit to the fixed cost in order to reach the goal profit.

Billing rate per participant = 10,000

Hotel charges per participant = 2,500

Contribution per participant = 7,500 (10,000 - 2,500)

225,000 is the fixed fee for the hotel room and amenities.

Break-even point in units = Contribution per unit – Fixed cost

= 30 individuals (225,000 -7,500)

Fixed cost plus profit minus contribution per unit equals break-even point in units with target profit.

Target profit = 337,500

= (225,000 + 337,500) ÷ 7,500

= 75 participants

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On solving the provided question, we got to know that side length of the square is 8 units.

Four sides that are equally spaced apart make up a square. Around us, a lot of things are rectangular. Equal sides and a 90° interior angle serve as a visual cue to identify a square. A closed square has four sides and exists in two dimensions (2D). A square has an equal number and parallel alignment of its four sides.

A four-sided shape known as a square has sides that are all the same length and angles that are all right angles with a 90 degree angle.

Here,

Area of square = [tex](side)^2[/tex]

64 =  [tex](side)^2[/tex]

[tex]Side = \sqrt{64}[/tex]

Side = 8 units

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Answer:

The intercepts are: (0, 3/7) and (-3/4, 0)

Step-by-step explanation:

If X=0

-4(0) + 7y = 3

7y = 3

Y = 3/7

If Y=0

-4x + 7(0) = 3

-4x = 3

X = -3/4

Answer:

Below

Step-by-step explanation:

Find two convenient integer coordinates ( 0,7)  and (5,-3)

slope = (y1-y2) / (x1-x2)  

    it does not matter which point your assign as '1' or '2'

slope = (  7 - - 3 ) / (0-5) =  10 /-5  = -2

Answer:

7 cm.

The triangle dimensions are:  50, 27, and 7 cm

Step-by-step explanation:

The three sides of the triangle make up the entire perimeter.  Add each side and set the result equal to 84cm, the perimeter.

(7x+1) + (4x-1) + (14-x) = 84 cm

10x + 14 = 84

10x = 70

 x = 7 cm

Use x=7 to find the three dimensions:

1)  (7x+1) = 50 cm

2)  (4x-1) = 27 cm

3)  (14-x) = 7 cm

Do these add to 84 cm?

 (50+27+7) = 84 cm  YES

The product cost per unit is $53.30 along the rims and $28.29 along the posts.

The average cost price is the quantity as an arithmetic average of the average amount. Average or mean is defined as the product of the total number of data given and the total number of data given. We have the cost of the goods and the overall quantity of goods or products provided when determining average cost pricing.

Cost price, for instance, equals selling price plus profit. Cost is equal to Selling price plus Loss. Cost price = 100 Selling Price + 100 + Profit (when the Selling Price and Profit Percentage are given)

According to the above questions :-

Direct Materials rims $20

Direct Labour rims  $12

Overhead                $21.30

Total cost is $53.30

Direct Materials posts $18

Direct Labour posts  $6

Overhead                $4.29

Total cost is $28.29

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When the skateboard's price, c, and the 7.5% sales tax are included, the simplified expression for the provided expression, c+0.075c, becomes 1.075c.

Mathematical expressions consist of at least two numbers or variables, at least one arithmetic operation, and a statement. It's possible to multiply, divide, add, or subtract with this mathematical operation. Mathematical operators like addition, subtraction, multiplication, and division are used to create expressions in writing. For instance, the mathematical equation for "4 added to 2" will be 2+4.

Here,

Given expression,

=c+0.075c

total cost=1.075c

The simplified expression for the given expression c+0.075c will be 1.075c when the skateboard cost c and the sales tax of 7.5% is added.

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Answer:

14

Step-by-step explanation:

x+8=? x= 6. i do know it