Can anyone please tell me what I’m doing wrong. It’s not giving me the full marks.

Answer:

either a ratio 8;7. or a percentage of 53% for picking the blue marble first i think and a 50/50 chance if you keep that blue marble out.

Step-by-step explanation:

Answer: [tex]\frac{4}{15}[/tex]

Step-by-step explanation:

Given: Number of blue marbles = 8

Number of red marbles = 7

Total number of  marbles = 8+7=15

Now, the probability that she first pulls a blue marble is given by :-

[tex]P(B)=\frac{\text{blue marbles}}{\text{Total marbles}}\\\\=\frac{8}{15}[/tex]

Now, total marbles left in bag = 15-1=14

Now, the probability that she second pulls a red marble is given by :-

[tex]P(B)=\frac{\text{red marbles}}{\text{Total marbles left}}\\\\=\frac{7}{14}=\frac{1}{2}[/tex]

Thus, the probability that she first pulls a blue marble and then a red marble is given by :-

[tex]P(B)\timesP(R)=\frac{8}{15}\times\frac{1}{2}=\frac{4}{15}[/tex]

Answer:

[tex]\text{cos}(B)=\frac{c}{a}[/tex]

Step-by-step explanation:

We have been given a triangle. We are asked to find [tex]\text{cos}(B)[/tex].

We know that cosine relates adjacent side of a right triangle to its hypotenuse.

[tex]\text{cos}=\frac{\text{Adjacent}}{\text{Hypotenuse}}[/tex]

We can see that side AB is adjacent side and CB is hypotenuse of our given right triangle.

[tex]\text{cos}(B)=\frac{AB}{CB}[/tex]

[tex]\text{cos}(B)=\frac{c}{a}[/tex]

Therefore, our required value is [tex]\text{cos}(B)=\frac{c}{a}[/tex]

Answer:

60

Step-by-step explanation:

Answer:

your answer is true.

Step-by-step explanation:

As 8 is in the hundredth place.

Answer:

The answer is True.

Step-by-step explanation:

9 is in the "ones place", 2 is in the "tens place, 8 is in the "hundreds place", and so on...

Answer:

C) [tex]g(x)-f(x)=x^2 + 2x -5-\frac{1}{x}[/tex]

Step-by-step explanation:

[tex]f(x) = \frac{1}{x}  \ g(x) = x^2 + 2x -5[/tex]

To find (g-f)(x) , we need to calculate g(x) - f(x)

WE know f(x) = 1/x  and g(x) = x^2 + 2x -5

Plug in g(x) and f(x) and then subtract

[tex]g(x)-f(x)=x^2 + 2x -5- (\frac{1}{x})[/tex]

All are unlike terms so we cannot combine like terms

[tex]g(x)-f(x)=x^2 + 2x -5-\frac{1}{x}[/tex]

In order to find (g - f)(x), you need to subtract f(x) from g(x). The correct subtraction results in the expression x^2+2x-5-1/x, corresponding with answer choice C.

The question asks you to calculate (g - f)(x) where f(x) = 1/x and g(x) = x^2 + 2x -5. This entails finding the difference between g(x) and f(x).

Firstly, write out g(x) and f(x):

Secondly, subtract f(x) from g(x):

g(x) - f(x) = (x^2 + 2x - 5) - (1/x)

This simplifies to: g(x) - f(x) = x^2 + 2x - 5 - 1/x

Therefore, the correct answer is C. x^2+2x-5-1/x

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Answer:

Yes they can be

Answer:

C. (-3.6, 17)

Step-by-step explanation:

The relative maximum occurs at an x coordinate between -3 and -4. The relative maximum is between 15 and 20. The best approximation is

C. (-3.6, 17)

Answer:

c. (-3.6, 17)

Step-by-step explanation:

The relative maximum is the maximum in a region.  The maximum between -6 and  is found and x=-3.6 and the value is 17.  So x=-3.6 and y=17

Answer:

None

Step-by-step explanation:

The center of the ellipse is at  (2,  4)

The length of the x axis is  a=  (8-2) =6

The length of the y axis is b=(16-4) = 12

The formula for an ellipse is

(x-h) ^2       (y-k)^2

----------- + -------------- = 1^2

a^2              b^2

where (h,k) is the center

and a and b are the  lengths of the major and minor axes

(x-2) ^2       (y-4)^2

----------- + -------------- = 1

6^2              12^2

 none of your choices have b>a  and for the ellipse to be vertical b>a

The equation 4t = 70 can be solved by dividing both sides by 4, yielding t = 17.5. This is not a quadratic equation, so the quadratic formula is not required.

To solve the equation 4t = 70 and approximate the value of t to four decimal places, we will first perform a simple algebraic operation. Divide both sides of the equation by 4 to isolate t.

t = 70 / 4
t = 17.5

This is a straightforward equation, but we should be cautious not to mix it up with a quadratic equation, which would require the use of the quadratic formula. The quadratic formula is used for equations of the form at² + bt + c = 0 and would look like this:

-b ± √b² - 4ac over 2a.

Given that the original equation provided is not quadratic, we do not need this formula for our current problem. The correct solution for our equation is t = 17.5.

Answer:

y=6

Step-by-step explanation:

I took the test and got 100%

Answer:

-30

Step-by-step explanation:

-18x1 - 4x3 = -18-12= -30

Answer:

The vertices of image are A'(0,0), B'(-1,-5) and C'(4,-5). The graph of image and preimage is shown below.

Step-by-step explanation:

From the given figure it is noticed that the vertices of  triangle ABC are A(0,0), B(1,5) and C(-4,5).

If a figure rotated at 180º about the origin, then

[tex]P(x,y)\rightarrow P'(-x,-y)[/tex]

The vertices of image are

[tex]A(0,0)\rightarrow A'(0,0)[/tex]

[tex]B(1,5)\rightarrow B'(-1,-5)[/tex]

[tex]C(-4,5)\rightarrow C'(4,-5)[/tex]

Therefore the vertices of image are A'(0,0), B'(-1,-5) and C'(4,-5).

The graph of image and preimage is shown below.

Answer:

B.) 28%

Step-by-step explanation:

There are 50 total spins so far and 28% of them have been 4's. So that is the probability.

Two equations for the purchase prices can be written. Let o and a represent the costs of an orange and an apple, respectively.

... 4o +5a = 3.56

... 3o +4a = 2.76

We can eliminate the o variable by subtracting 3 times the first equation from 4 times the second:

... 4(3o +4a) -3(4o +5a) = 4(2.76) -3(3.56)

... a = 0.36 . . . . simplify

This value can be substituted into either equation to find o. Let's use the first one.

... 4o +5·0.36 = 3.56

... 4o = 1.76 . . . . . . . . . subtract 1.80

... o = 0.44 . . . . . . . . . divide by 4

The cost of an orange is $0.44; the cost of an apple is $0.36.

_____

Comment on the solution

There are perhaps half a dozen different ways to solve a pair of linear equations in two variables. This method isn't necessarily the easiest, but it works. If you have a graphing calculator, quite often it includes matrix operations that will solve this quickly and easily.

Answer:

25 represents how much he makes per hour

Step-by-step explanation:

A general proof for this would be that since Angle A + Angle F + Angle E = 180°, and each of these angles is congruent to some angle inside of Triangle CGH; that CGH would equal 180°.

Interior angles of triangles = 180°, which is common knowledge; unfortunately this isn't an answer choice - so we use the above proof.

F ~= C

A ~= H

E ~= G

So, Angles A and H are congruent would be the correct solution.

In reference to the image below, the trigonometric ratio cos  [tex]\alpha[/tex]° is calculated by dividing the base by the hypotenuse, thus making part c) 15 ÷ 17 the correct option.

The trigonometric ratios are six different proportions of the three sides of right angled triangle, namely, hypotenuse, perpendicular and base. The trigonometric ratios are sine, cosine, tan, sec, cosec and cot.

In the given question, the trigonometric ratio cos is given by dividing the base of the triangle to the hypotenuse.

In any question,

hypotenuse = side opposite of the right angle = 17

base  = side adjacent to the acute angled marked =  15

Thus giving the value of cos [tex]\alpha[/tex]° as 15 ÷ 17.

Learn more about trigonometric ratios here

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The complete question is given below:

A right angle triangle is shown with hypotenuse equal to 17 centimeters. An acute angle of the triangle is labeled as  [tex]\alpha[/tex] degrees.

What is the value of cos [tex]\alpha[/tex]°?

a. 8 ÷ 17

b. 17 ÷ 8

c. 15 ÷ 17

d. 8 ÷ 15

The figure of triangle is given below:

Answer:

I think the answer is neither. Hope this helps.

Step-by-step explanation:

Answer:

65,550.

Step-by-step explanation:  

We have been given that the population of a town increased by 15% in 2016, and decreased by 5% in 2017.

Since an exponential is in form: [tex]a*b^x[/tex].  

For growth b=(1+r), where r in rate in decimal form.  

For decrease b=(1-r), where r in rate in decimal form.

[tex]15\text{ percent}=\frac{15}{100}=0.15[/tex]

Let us find the population increase in 2015.

[tex]\text{Population at the end of year 2016}= 60,000*(1+0.15)^1[/tex]  

[tex]\text{Population at the end of year 2016}= 60,000*(1.15)[/tex]  

[tex]\text{Population at the end of year 2016}= 69,000[/tex]

Therefore, the population at the end of year 2016 will be 69,000.

Now let us find population decrease of 5% in year 2017.

[tex]15\text{ percent}=\frac{5}{100}=0.05[/tex]

[tex]\text{Population at the end of year 2017}= 60,000*(1-0.05)^1[/tex]  

[tex]\text{Population at the end of year 2017}= 60,000*(0.95)[/tex]  

[tex]\text{Population at the end of year 2017}= 65,550[/tex]  

Therefore, the population at the end of year 2017 will be 65,550.

Answer:

[tex]\frac{7}{9}[/tex]

Step-by-step explanation:

we know that

The probability of an event is the ratio of the size of the event space to the size of the sample space.  

The size of the sample space is the total number of possible outcomes  

The event space is the number of outcomes in the event you are interested in.  

so  

Let

x------> size of the event space

y-----> size of the sample space  

so

[tex]P=\frac{x}{y}[/tex]

step 1

Find the probability of selecting a literature book

we have

[tex]x=3[/tex]

[tex]y=3+4+2=9[/tex]

substitute

[tex]P=\frac{3}{9}[/tex]

step 2

Find the probability of selecting an algebra book

we have

[tex]x=4[/tex]

[tex]y=3+4+2=9[/tex]

substitute

[tex]P=\frac{4}{9}[/tex]

step 3

Find the probability of selecting a literature book or an algebra book

Adds the probability of selecting a literature book plus the probability of selecting an algebra book

[tex]P=\frac{3}{9}+\frac{4}{9}=\frac{7}{9}[/tex]

Answer:

Step-by-step explanation:

Is it mutually exclusive?

We know that, Volume of a Rectangular Prism is given by :

✿  {Length × Width × Height}

Given : The Length of Rectangular Prism = 5.5

Given : The Width of Rectangular Prism = 6

Given : The Height of Rectangular Prism = 3

⇒ The Volume of given Rectangular Prism = {5.5 × 6 × 3}

⇒ The Volume of given Rectangular Prism = 99

Answer:

B Twelve students answered Mr. Chiu’s question.

C Three people studied for two hours.

F Four people studied for four or more hours.

Step-by-step explanation:

Trust me on this, also can I have brainiest please?

Hope you do well! :D

The information that can be missing from the dot plot is the scale and data points.

A scatter plot is a type of plot or mathematical diagram using Cartesian coordinates to display values for typically two variables for a set of data. If the points are coded, one additional variable can be displayed.

Elias dot plot may not have a distinct scale on the axes, which makes it challenging to identify the precise values or quantities being displayed. This is based on the fundamental idea of a dot plot. A scale offers the required context for correctly analysing the data by, among other things, specifying the measurement intervals or units that were employed.

Furthermore, certain data points, such as the number of tropical fish in each tank or the exact values being displayed, may be absent from the dot plot. It would be difficult to evaluate the dot plot or make inferences from it without the actual data points. Overall, it is impossible to pinpoint exactly what information may be lacking without further detailed details concerning Elias' dot plot.

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complete question:

Elias made a dot plot that shows the number of tropical fish contained in the 14 aquariums at the pet store. What information is missing from Elias dot plot?

The unit rate is another way of saying speed, so we divide the distance over the time. We can pick on any row

If we pick row 1, then, speed = distance/time = 90/2 = 45

Row 2 says the same thing: 135/3 = 45

So does row 3: 225/5 = 45

and so on

Because the speed is 45 mph, the unit rate is 45 miles in one hour. The term "unit" implies how much distance can be covered in one unit of time, in this case 1 hour.

You have the correct answer. Nice work.

Answer:

Since, KLMN is a parallelogram, then by the property of parallelogram that opposite angles of a parallelogram is equal, therefore ∠N=∠L and ∠M=∠K.

Step-by-step explanation:

Answer:

It is followed by properties of parallelogram and the proof is explained in step-by-step solution.

Step-by-step explanation:  

Given a parallelogram KLMN

Parallelogram is a quadrilateral with parallel opposite sides.  

To Prove: ∠N≅∠L and ∠M≅∠K  

In Parallelogram KLMN the opposite sides are parallel therefore, the opposite angles are vertical angles. And the vertical angles are always equal and congruent. Hence,  

∠N≅∠L and ∠M≅∠K  

For any quadrilateral sum of all angles equal to 360°  

m∠K + m∠L + m∠M + m∠N = 360°  

Now given quadrilateral is parallelogram therefore opposite angles are equal. So, we can write m∠L = m∠N, m∠M = m∠K  

⇒ m∠K + m∠N + m∠K + m∠N = 360°  

2 m∠K + 2 m∠N = 360°  

m∠K + m∠N = 180°  

For the same parallelogram, because opposite sides are equal therefore use m∠K = m∠L, m∠N = m∠M using above equation, we get  

m∠L + m∠M = 180°  

Because m∠M = m∠K  

m∠K + m∠L = 180°  

Same Side Interior Angles Theorem states that if the two parallel lines intersect or cut by a transversal then the interior angles on the same side are supplementary that means their sum is equal to 180°  

Hence, by above theorem m∠K + m∠N = 180°  

& m∠K + m∠L = 180°  

By above two equations, we get  

m∠K + m∠N = m∠K + m∠L  

because m∠K = m∠M & ∠N = ∠L  

⇒ m∠L + m∠M = m∠K + m∠L  

Because opposite angles of a parallelogram are alternate angles therefore are equal. hence,  

m∠N = m∠L  

m∠M = m∠K  

Angle congruency postulate  

Opposite angles of parallelogram are vertical angles and the vertical angles are congruent as well as equal.  

∠N≅∠L and ∠M≅∠K  

Substitution Property of equality states that if one angle is equal to another angle the one can be substituted in the place of another that means if ∠M=∠K then we can substituted ∠K in place of ∠M  

Transitive property of congruence states that if if the two angles or segments or triangles are congruent to third then they are congruent to each other.  

Subtraction Property of Equality states that if if two sides of any equation are equal then subtraction of same value from both sides results in equality of equation.  

Parallel lines are those lines which do not intersect or cut each other at the end.  

Parallelogram is a quadrilateral have opposite sides equal and parallel.  

:

[tex]\text{Use}\\\\\dfrac{a^n}{a^m}=a^{n-m}\\\\(a^n)^m=a^{n\cdot m}\\-------------------------\\\\\left(\dfrac{w^{15}}{w^5}\right)^4=\left(w^{15-5}\right)^4=\left(w^{10}\right)^4=w^{10\cdot4}=w^{40}\\\\Answer:\ \boxed{\left(\dfrac{w^{15}}{w^5}\right)^4=w^{40}}[/tex]

Answer:

15

Step-by-step explanation:

The fact angle G and F are equal means the triangle is isosceles triangle. And an isosceles triangle has two equal sides on the opposite sides of the equal angles. Which means x equals HF which is 15.  

Question

What is the value of x?

Answer:

Step-by-step explanation:

this is an isosceles triangle, 2 equal sides and 2 equal angles, so

FH = GH

15 = 15

Answer:

$4.72

Step-by-step explanation:

16.79+28.49=45.28

50-45.28=4.72