suppose that a certain college class contains students. of these, are juniors, are chemistry majors, and are neither. a student is selected at random from the class. (a) what is the probability that the student is both a junior and a chemistry major? (b) given that the student selected is a junior, what is the probability that she is also a chemistry major?

Answer:

slope = (3/10)

Step-by-step explanation:

(-3, 3) and (7, 6)

(x₁, y₁)        (x₂, y₂)

        y₂ - y₁         6 - 3             3              3

m = ------------ = ------------ = ------------ = ----------

        x₂ - x₁         7 - (-3)        7 + 3           10

I hope this helps!

The translation shift the coordinates of the expression in the right side. And there is no change in the reflection based equation because of the absolute symbol.

What is translation and reflection?

In mathematics, the translation shift the coordinates either on the horizontal axis or on the vertical axis. It compress the expression also. Similarly, in reflection, the expression get reflected on the coordinate axis either on the upper side or downward side.

According to the question, the given expression for the translation as well as for the reflection are as follows:

h(x)=a |b(x) + c| + d

g(x)=1/3 | x + 3| - 4

And the given condition state that the translation is for 7 units and reflection is on the y-axis. Translation shift the expression and reflection reflects the expression.

Translation expression: h(x+7)=a |b(x+7) + c| + d

Reflection expression: g(-x)=1/3 | -x + 3| - 4 = 1/3 | x + 3| - 4

Therefore, the translation shift the coordinates of the expression in the right side. And there is no change in the reflection based equation because of the absolute symbol.

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Answer:

x = 15

Step-by-step explanation:

the exterior angle of a triangle is equal to the sum of the 2 opposite interior angles.

3x - 5 is an exterior angle of the triangle, then

3x - 5 = x + 25 ( subtract x from both sides )

2x - 5 = 25 ( add 5 to both sides )

2x = 30 ( divide both sides by 2 )

x = 15

Answer:

40° and 115°

Step-by-step explanation:

x+3x-5+25°=180°(angle on a straight line)

4x+20=180°

4x=180°-20

4x=160°

x=160/4

x=40°

The other angle

3x-5=3(40)-5

120-5=115°

total

40°+25°+115°=180°

The solutions to the equation are x = 5 and x = 3

The equation is given as

|x - 4|= 1

The above equation is an absolute value equation

When the absolute value sign is removed from the equation, we have

x - 4 = 1 or x - 4 = -1

Add 4 to all sides of the equation

So, we have the following equations

x = 1 + 4 or x = 4 - 1

Evaluate

x = 5 or x = 3

This means that the value of the equation is x = 5 or x = 3

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well, the change was 8 bucks.

if we take 20 to be the 100%, what is 8 off of it in percentage?

[tex]\begin{array}{ccll} amount&\%\\ \cline{1-2} 20 & 100\\ 8& x \end{array} \implies \cfrac{20}{8}~~=~~\cfrac{100}{x} \\\\\\ \cfrac{5}{2}=\cfrac{100}{x}\implies 5x=200\implies x=\cfrac{200}{5}\implies x=40[/tex]

Answer:

532

Step-by-step explanation:

Sum of the first n terms of an arithmetic series:

[tex]\boxed{S_n=\dfrac{n}{2}(a_1+a_n)}[/tex]

Where:

Given terms:

Substitute the given terms into the formula to create an equation for the nth term:

[tex]\implies S_n=\dfrac{n}{2}(12+64)[/tex]

[tex]\implies S_n=\dfrac{n}{2}(76)[/tex]

[tex]\implies S_n=38n[/tex]

To find S₁₄, substitute n = 14 into the found equation:

[tex]\begin{aligned}n=14 \implies S_{14}&=38(14)\\ & = 532\end{aligned}[/tex]

Using the half life of palladium, mass seven weeks after start was 0.7931 gm.

The half-life is the amount of time it takes for a quantity (of material) to fall to the cost. In nuclear physics, the phrase usually refers to how rapidly neutrons become radioactive atoms or how long stable atoms survive.

The term can also refer to any sort of hyperbolic (or, in rare situations, non-exponential) decay.

The  half life of palladium 100 = 4 days

after 24 days sample has reduced to a mass of 5mg

standard exponential function is

[tex]P = P_o e^{kt}[/tex]

plugging P = P₀ /2

[tex]P_o/2 = P_o e^{4k }[/tex]

[tex]1/2 = e^{4k }[/tex]

ln (1/2) = 4k

k = -0.1733

function becomes

[tex]P = P_o e^{- 0.1733 t }[/tex]

plugging P = 5 and t = 24

[tex]5 = P_o e^{( - .1733\times 24 ) }[/tex]

P₀ = 320.10

In the medical sciences, for example, the biological half of drugs and other chemicals in the human body is referred to. The flipside of half-life is doubling time in exponential growth.

For the second part of the problem:

7 weeks = 5 × 7 =49 days

plugging t = 49

[tex]P = 320.10 e^{(-.1733 * 35 ) }[/tex]

mass 7 weeks after = 0.7431 mg

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Answer:

Step-by-step explanation:

What is the answer:

4(3x+2)-2=

12x + 8 - 2 =

12x + 6

The degrees to radians conversion is given as 1° = π/180 radian thus the conversion of 310° is (31/18)π.

To convert any unit into another is called a unit conversion.

In order to convert units, we need to care about their dimensions their dimension should not be changed.

It is known that π radian = 180°.

1° = (π/180) radian.

Multiply both sides by 310

310° = (π/180)310

310° = (31/18)π

Hence "The degrees to radians conversion is given as 1° = π/180 radian thus the conversion of 310° is (31/18)π".

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The given question is incomplete complete question is ;

Convert the angle \theta=310^\circθ=310∘

theta, equals 310, degrees to radians.

The value of x is 54.

If a transversal meets two parallel lines, each pair of same-side interior angles is supplementary (their sum is 180°), according to the theorem for the "same-side interior angle theorem."

The given angles in the figure are 2x + 42° and x - 24°, which are interior angles formed on the same side of the transversal.

By Same Side Interior Angles Theorem,

2x + 42° + x - 24° = 180°

3x + 18° = 180°

3x = 180° - 18°

3x = 162°

x = 54

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[tex] - {k}^{2} + 3k = 28 - 2 {k}^{2} \\ - {k}^{2} + 2 {k}^{2} + 3k - 28 = 0 \\ {k}^{2} + 3k - 28 = 0 \\ (k + 7)(k - 4) = 0 \\ \\ k + 7 = 0 \\ \\ ork - 4 = 0 \\ \\ k = - 7 \\ \\ or \\ \\ k = 4[/tex]

ATTACHED IS THE SOLUTION

I GROUPED THE LIKE TERMS TOGETHER FIRST AFTER THAT THEN FACTORISED.

Options A and B are functions as either if of the inputs is relating to a different output or different inputs relating to a single output.

A function can be thought of as a set of inputs that produces some output.

We know a relation is a function if every input relates to a different output sometimes many input relates to one output but one input relates to different outputs is not a function.

Option A is a function as every input relates to a different output.

Option B is not a function as the input - 4 relates to two different outputs 12 and 15.

Option C is also a function as every preimage has a different image.

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The depth of the personal submarine is -14.9 meter.

An integer is a whole number that can be positive, negative, or zero and is not a fraction. Integer examples include: -5, 1, 5, 8, 97, and 3,043. 1.43, 1 3/4, 3.14, and other numbers that are not integers are some examples.

Given that,

The submarine descends 20.6 meters and then ascends 5.7 meters. it means 20.6 is a negative number and 5.7 is a positive number.

Now,

To find the depth adding the -20.6+5.7

-20.6+5.7

-14.9

Hence, The depth of the personal submarine is -14.9 meter

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The value of p that we get by solving the inequality given in the question is [tex]p\geq \frac{-20}{3}[/tex]

The given inequality is

[tex]\frac{3}{4}p+8\geq 3[/tex]

⇒[tex]\frac{3}{4}p\geq 3-8[/tex]                              (subtracting 8 on both sides)

⇒[tex]3p\geq -5*4[/tex]                             (multiplying both sides by 4)

⇒[tex]p\geq \frac{-20}{3}[/tex]                                  (dividing both sides by 3)

⇒[tex]p\geq -6.667[/tex]

Therefore the value of p must be greater than or equal to -20/3 or -6.667

That is, [tex]p\geq -6.667[/tex]

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Answer:

x > 9

Step-by-step explanation:

Answer:

KM

KL

LM

Step-by-step explanation:

Any transformation that leaves the sides and angles of flat figures unaltered is referred to as rigid transformation or isometry. Congruent pictures are produced by reflection in the plane, translations, rotations, or a combination of them.

A transformation that maintains the size and shape of a geometric figure is known as a rigid transformation (or isometry). is a unique kind of transformation that doesn't alter a figure's size or shape.

The complete question is:

Make a conjecture. How are rigid transformations and congruent figures related? Check all that apply

a) rigid transformations preserve segment lengths and angle measures.

b) Rigid transformations produce congruent figures.

c) If two figures are congruent, then there is a rigid transformation or a combination of rigid transformations that will map one onto the other.

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Answer:

324 square inches

Step-by-step explanation:

A = S squared

A = 18 x 18

A = 324square inches

The graph represents the cosine graph, the coordinates of B is (-180, -1 )

This is a type of graph used to depict cosine values of angles. The maximum and minimum points in these type of graph is 1 and -1.

The zero points gives the maximum point on the graph, hence the graph starts at ( 0, 1 )

Point B is found by analyzing the graph.

The point is located at the minimum which is -1. this is for the output value.

The input value which is the x direction we look at the cycles covered. one full cycle is 360 degrees or -360 degrees.

Point B is in the negative and coves half cycle which is -180

Hence B ( -180, -1)

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Answer:

(4 , 1)

Step-by-step explanation:

This is because to find the coordinate on a graph, it is written as ( x , y) and x is on 4 and y is on 1.

that's my opinion.

Nice question

The total of animals is a prime number and hence the ratio can only be expressed as fraction.

To find the ratio in the given question, we must first of all add the total sum of the animals given and then find the ratio to each one.

Total number of items given

[tex]12 + 5 + 6 = 23[/tex]

The ratio of spiders to mosquitoes to rats are

[tex]\frac{12}{23}:\frac{5}{23}:\frac{6}{23}[/tex]

The total sum of animals is a prime number and can't be divided, however, the ratio is expressed as simple as possible.

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It is shown that if a parallelogram's diagonals are perpendicular, the parallelogram is a rhombus.

A parallelogram is a quadrilateral with two parallel sides (and therefore opposite angles equal).

A rhombus is a quadrilateral with all of its sides equal. Because opposite sides of a parallelogram are equal, a rhombus is a type of parallelogram in which all sides are equal.

We must demonstrate that if the diagonals of a parallelogram are perpendicular, then the parallelogram is a rhombus.

Let ABCD be a  parallelogram .

Consider Δ AOD and Δ COD

Since, a parallelogram's diagonals bisect each other we can say that,

AO = CO

∠AOD = ∠COD = 90°

DO = OD

Δ AOD ≅ Δ COD [SAS rule]

∴ AD = CD

Because the parallelogram's adjacent sides are equal, we can conclude that all four sides are equal.

As a result, it is demonstrated that if the diagonals of a parallelogram are perpendicular, the parallelogram is a rhombus.

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Option A, Pie chart best used for displaying frequency distributions when one or two categories make up a large proportion of the total.

A piechart is best which is used for displaying frequency distribution when one or two categories make up a large proportion.

Hence, the Pie chart is best.

Pie chart - A pie chart is a statistical visualization in the shape of a split region that displays numerical information. The arc length of each slice in a pie chart is proportionate to the quantity represented.

Explanation of incorrect options,

Bar graph - A bar chart is a form of chart or graph that depicts categorical data using rectangular bars whose height or length is proportionate to the value they represent. face. Bars can be drawn vertically or horizontally. A histogram is another name for a vertical bar chart.

Comparative pie chart - Pie graphs have pie graphic areas comparing ratios by frequency. The greater the radius of the pie chart, the greater the number of individuals it depicts. This allows you to compare the two data sets visually.

Comparative bar graph - Chart displaying continuous comparisons of columns indicating different portions of the same category. This facilitates the comparison of visual data.

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Hence, the survey of professor will be representative survey.

A survey is a technique for acquiring data from a sample of people by asking pertinent questions with the goal of comprehending populations as a whole.

Everyone involved in the information economy, from corporations to the media to the government and academia, relies on surveys as a vital source of information and insights.

The survey of professor will be representative survey.

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Answer:

The percent of change is about a 16.95% increase.

The predicted population in 2019 is 158,000 people.

sry if im wrong

Step-by-step explanation:

The p-value of the test is 0.1515 which concludes that the average amount of arsenic in chicken from suppliers is 80 ppb.

The test hypothesis is as follows:

H₀: The mean amount of arsenic is 80 ppb, i.e. μ= 80.

Hₐ: The mean amount of arsenic is more significant than 80 ppb, i.e.μ > 80.

We will apply a t-test for a single mean because the population standard deviation is unknown,

It is assumed that the sample means  [tex]\bar{x}[/tex] = 91.

The adjusted sample presented is:

S = { 62, 78, 89, 95, 95, 137}

Calculate the sample standard deviation as follows:

[tex]\bar{x}[/tex] = 62 + 78 + 89  + 95 + 95 + 137 =80

[tex]s =\sqrt{\frac{1}{6-1} \times [(62-80)^2 + (78-80)^2 + (89-80)^2 + (95-80)^2 + (95-80)^2 + (137-80)^2]}[/tex]

s =28.66

[tex]t =\dfrac{\bar{x}-\mu}{s/ \sqrt{n} } = \dfrac{{91}-80}{28.6/ \sqrt{6} }=0.94[/tex]

Thus, the test statistic value is 0.94.

Compute the p-value of the test as follows:

p-value = p(tₙ₋₁ < t)

p-value = p(t₆₋₁ < t)

p-value = p(t₅ < t)

*Make use of a t-table.

As a result, the test has a p-value of 0.1515.

Rule of decision:

The null hypothesis will be rejected if the p-value of the test is less than the significance threshold, and vice versa.

p-value = 0.1515 > α = 0.05

At 5% significance, the null hypothesis will not be rejected.

As a result, we may conclude that the average amount of arsenic in chicken from suppliers is 80 ppb.

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To solve for y we will have to simply replace the value of x and the solution we write it in the equivalent palce for y, that is:

For x = -5:

For x = -2:

For x = 0:

For x = 3: