Mathematics High School

If f(x)=x+7 and g(x)=1/x-13 what is the domain of (f*g)(x)
A. {x| x = 6}
B. {x| x = -6}
C. {x| x = -13}
D. {x| x = 13}

Answers

Answer 1
I think the answer is b
Answer 2

Answer:

The Answer is B

Step-by-step explanation:

If you do the math, this would be the conclusion you would come up with.

Related Questions

WILL GIVE BRAINLIEST TO PERSON WHO ANSWERS CORRECTLY!!!!!!

Which pair of variables is the most likely to have both correlation and causation?

* the height of a person and the amount of work he does
* the number of hours spent exercising and the number of calories burned
* the length of a person's commute and the amount of money he earns
* the number of customers at a restaurant and the variety of soups ordered

Answers

I'm pretty sure its the second one

A boat in calm seas travels in a straight line and ends the trip 16 km west and 50 km north of its original position. Find the direction of the trip to the nearest tenth of a degree.

Answers

Take the sin(∠boat)= side opposite the angle (50 km)/ (hypotenuse)
 sin(∠boat)= 50/52.5
(take the invers sin of (50/52.5)
∠boat= 80.3° North West

ANSWER:
The boat's traveled 80.3° North West

Suppose that in a certain triangle, the degree measures of the exterior angles are in the ratio 2:3:4. If the largest interior angle measures y degrees, what is the value of y?

Answers

first you should calculate total of the ratios:
2+3+4=9
then divide 360 by 9 (because the total degrees of the exterior angles in polygon is 360)
[tex]360 \div 9 = 40[/tex]
at the end find the amount of the exterior angles:
[tex]2 \times 40 = 80 \\ 3 \times 40 = 120 \\ 4 \times 40 = 160[/tex]
the shortest exterior angle is 80 degrees
so it has the largest interior angle:
180-80=100
the answer is 100

Final answer:

To find the largest interior angle y in a triangle with exterior angles in the ratio 2:3:4, we use the fact that the sum of a triangle's exterior angles is 360° to find the value of each exterior angle, then deduce y as the supplement of the largest exterior angle, resulting in y being 20°.

Explanation:

To find the value of the largest interior angle y in a triangle where the exterior angles are in the ratio 2:3:4, we start by understanding that the sum of the exterior angles of any triangle is 360°.

This means that the exterior angles in this triangle are 2x, 3x, and 4x degrees, respectively, where x is a common multiple.

Given that the sum of these angles must be 360°, we can write the equation 2x + 3x + 4x = 360°, simplifying to 9x = 360° and solving for x gives us x = 40°.

The largest exterior angle is 4x, which equals 160°. Since the exterior angle is supplementary to the interior angle it shares a vertex with, the largest interior angle y is therefore 180° - 160° = 20°.

Thus, the value of y is 20°.

KAN SOMEBODY HEPLME #ONSANGRE #ON9INE3REY

Derek wrote the following paragraph proof for the Vertical Angles Theorem:

The sum of angle 1 and angle 4 and the sum of angle 3 and angle 4 are each equal to 180 degrees by the definition of supplementary angles. The sum of angle 1 and angle 4 is equal to the sum of angle 3 and angle 4 by the transitive property of equality. Angle 1 is equal to angle 3 _____________________.

Which phrase completes the proof?
by construction using a straightedge
by the definition of a perpendicular bisector
by the subtraction property of equality
by the vertical angles theorem

Answers

Hey there! :D

It's important to remember that vertical angles are congruent. They are angles that you could draw a line through the vertex, and it would create 2 more equal angles. 

Also, the question even states that "Derek wrote the following paragraph proof for the vertical angles theorem." 

So, the answer is 'the vertical angles theorem".

I hope this helps!
~kaikers

subtraction property of equality (i just took that test and got it right)

You are driving at an average speed of 50 miles per hour. You drive 22 hours, and you still need to drive another 175 miles. Which graph models how far you are from your destination at any point in time?

Answers

7650 i think that is the answer please correct me if that wrong 



pls xd

helppppppppppppppppppppp

Answers

The domain of a(x) is all of R. The domain of b is the range where [tex]x-4 \geq 0, hence \ x \geq 4[/tex]. We can calculate the composition boa by changing in the expression for b, every x with a(x). Hence, boa(x)=[tex] \sqrt{(3x+1)-4} [/tex]=[tex] \sqrt{3x-3} [/tex]. Again for a function with a root to be defined, we need that the expression under the square root has to be positive. Hence, 3x-3[tex] \geq [/tex] 0.Thus, the set where this holds is [tex]3x \geq 3, x \geq 1[/tex]. This is also the domain of the function boa(x).

What does (r−c)(3) mean about George's new store?

Answers

subtract r from c to get 8x+10

 replace x with 3

8(3) +10 = 34 which in hundreds is 3400 dollars

the answer is C

WXYZ is an isosceles trapezoid with legs WX and YZ and a base XY. If the length of WX is 6x+5, the length of XY is 10x+4 and the length of YZ is 8x-3, find the value of x.

Answers

Answer: x = 4

Explanation:

An isosceles trapezoid has two opposite sides (the bases) parallel, and the two other sides (the legs) are of equal length.

So, since the two legs are of equal length, you only need to use the information of the two legs:

Leg WX: 6x + 5

Leg: YZ: 8x - 3

Leg WX = Leg YZ => 6x + 5 = 8x - 3

6x + 5 = 8x - 3

=> 8x - 6x = 5 + 3

=> 2x = 8

=> x = 8 / 2

=> x = 4

A right triangle has a leg of 13 cm and a hypotenuse of 21 cm. What is the length of the other leg? Round to the nearest tenth
A. 8.0 cm
B.16.5 cm
C. 24.7 cm
D. 272.0 cm

Answers

The other leg of the right triangle will be 16.5cm.

Legs of a right triangle:

The side which shares the common/neighboring border to the right angle in a triangle is called legs.

Pythagoras theorem:

It states that the sum of the areas of the two squares on the legs equals the area of the of the square on the hypotenuse.

According to the given question, we have

length of one leg of the right triangle is 13cm.

hypotenuse of the right triangle is 21 cm .

Let x be the length of the other leg.

Now, according to the Pythagoras theorem

We can write as

[tex](21)^{2} = x^{2} +(13)^{2}[/tex]

⇒ 441 = [tex]x^{2} +169[/tex]

⇒[tex]441-169 =x^{2}[/tex]

⇒ [tex]272 =x^{2}[/tex]

⇒ [tex]x = \sqrt{272}[/tex]

⇒[tex]x = 16.49[/tex] ≈ 16.5cm

Hence, the other leg of the right triangle will be 16.5cm.

Learn more about Pythagoras theorem here:

https://brainly.com/question/343682

#SPJ2

I need help with this equation! Carbon-14 has a half-life of 5730 years. Derek has a sample of a fossil that has 33mg of its original 100 mg of carbon-14. Find the decay constant, k, and use it to answer the questions that follow.
First use the formula P(t)=Ae ^{kt} , to find the decay constant, k

Answers

First all, the decay formula is [tex]P(t)=Ae^{-kt} [/tex]
where:
[tex]P(t)[/tex] is the remaining quantity after [tex]t[/tex] years
[tex]A[/tex] is the initial sample
[tex]t[/tex] is the time in years 
[tex]k[/tex] is the decay constant 

From the problem we know that [tex]A=33[/tex] and [tex]P=100[/tex], but we don't have the time [tex]t[/tex]; to find it we will take advantage of the half-life of the Carbon-14. If you have a sample of 100 mg and Carbon-14 has a half-life of 5730, after 5730 years you will have half of your original sample i.e. 50 mg. We also know that after [tex]t[/tex] years we have a remaining sample of 33mg, so the amount of the sample that decayed is [tex]100mg-33mg=67mg[/tex]. Knowing all of this we can set up a rule 3 and solve it to find [tex]t[/tex]:
[tex] \frac{100mg--\ \textgreater \ 5730years--\ \textgreater \ 50mg}{100mg--\ \textgreater \ (t)years---\ \textgreater \ 67mg} [/tex]
[tex] \frac{5730years--\ \textgreater \ 50mg}{(t)years---\ \textgreater \ 67mg} [/tex]
[tex] \frac{5730}{t} = \frac{50}{67} [/tex]
[tex]t= \frac{(5730)(67)}{50} [/tex]
[tex]t=7678.2[/tex]

Now that we know our time [tex]t[/tex] lets replace all the values into our decay formula:
[tex]33=100e^{-7678.2k} [/tex]
Notice that the constant [tex]k[/tex] we need to find is the exponent; we must use logarithms to bring it down, but first lets isolate the exponential expression:
[tex] \frac{33}{100} = e^{-7678.2k} [/tex]
[tex]e^{-7678.2k} = \frac{33}{100} [/tex]
[tex]ln(e^{-7678.2k} )=ln( \frac{33}{100} )[/tex]
[tex]-7678.2k=ln( \frac{33}{100} )[/tex]
[tex]k= \frac{ln( \frac{33}{100}) }{-7678.2} [/tex]
[tex]k=-0.000144[/tex]

We can conclude that the decay constant [tex]k[/tex] is approximately  -0.000144


Ten times the sum of a number and
15
is at least
26
.
Use the variable
b
for the unknown number.

Answers

At least means greater than or equal to.

10 × (15+b) ≥ 26
150+10b ≥ 26
10b ≥ -124
b ≥  -12.4

help:/

Determine if the number is written in scientific notation. If not explain.
1. 4.8x100^7

No; it is not written as a number times a power of 10
yes; the number is written in scienfic notation
no; the first factor is not a number between 1 and 10

2. 5.1x10^-8
yes; the number is written in scienfic notation
no; the first factor is not a number between 1 and 10
no; it is not written as a number times a power of 10

Answers

The answers are the following:
1. 4.8x100^7 is not in scientific notation.
No; it is not written as a number times a power of 10. It should not be "times 100" because in scientific notation, the highest number to be expanded by the degree is 10. 

2. 5.1x10^-8 is in scientific notation.
yes; the number is written in scienfic notation. This is because it has a base number and multiply to x10^-8 which is the exponent indicating that the expanded value is 0.000000051

helpppppppppppppppppppppppppppp

Answers

Answer:
sqrt(14)

Explanation:
The absolute value of a complex number a+bi can be calculated as follows:
|a+bi| = sqrt(a^2 + b^2)
we have:
a = -4
b = -sqrt(2) i

Substitute with the values in the above equation to get the absolute value as follows:
|a+bi| = sqrt [(-4)^2 + (sqrt(2) i)^2] = sqrt(14)

Daniel Potter bought a new car for $20,000.00. Two years later, he wanted to sell it. He was offered $14,650.00 for it. If he sold it for that amount, what was his depreciation rate?

Answers

First compute the different of the price like this:
 $20,000.00-$14,650.00=5350$
Then divide like this:
[tex] \frac{5350.00}{20,000}=75 [/tex]
Now compute the percentage like this:
[tex]0,26\times100=26.75\%[/tex]
In order to compute the rate, divide by the number of years we get:
[tex]\dfrac{26.75}{2}=13.37\%[/tex]
The rate of depreciation is [tex]13.37\%[/tex]. 


Answer: 13.375% per year

Explanation:

1) Depreciation is the loss of value: $ 20,000.00 - $ 14,650.00 = $ 5,350

2) The percent of depreciation is amount of the depreciation divided by the value of the car when purchased, times 100.

That is (5,350 / $ 20,000) * 100 = 26.75 %

2) The rate is percent of depreciation per year:

depreciation rate = % of depreciation / number of years = 26.75%  / 2 = 13.375% per year.

A used book store buys a hardback book for $1.50 and then sells it for $5. Over time, the store sells the same number of books it buys. The store manager can use the equation P(x)=5x−1.5x to determine the store's profit, P(x), where x is the number of books that the store sells. Which statement about the book store is true based on the profit equation?

A.The book store makes a profit of $5.00 for each hardback book that is sold.
B.The book store makes a profit of $3.50 for each hardback book that is sold.
C.The book store makes a profit of $4.50 for each hardback book that is sold.
D.The book store sells each hardback book for $3.50

Answers

A used book store buys a hardback book for $1.50 and then sells it for $5. Over time, the store sells the same number of books it buys. The store manager can use the equation P(x)=5x−1.5x to determine the store's profit, P(x), where x is the number of books that the store sells. Which statement about the book store is true based on the profit equation?

Cost Price of book, C.P.=$1.50

Selling Price of book, S.P.=$5

PROFIT=S.P. -C.P.

So, Profit=$5-$1.50=$3.50

So, Profit=$3.50 on each book

Or, we are given P(x)= 5x-1.50x

Or, P(x)=3.50x

For each book, we must divide the profit P(x) by x, that is, number of books

[tex] \frac{P(x)}{x}=\frac{3.5x}{x} [/tex]

[tex] \frac{P(x)}{x}=\frac{3.5*1}{1} [/tex]

[tex] \frac{P(x)}{x}=3.5 [/tex]

So, Profit for each book sold is $3.50

Answer:Option C

Answer:

C

Step-by-step explanation:

im too smort

Sue’s Corner Market has a markup of 60% on bottled water. If the market sells a bottle of water for $2, find the original amount that Sue pays.

Answers

Markup is the amount added to the cost price of goods to cover overhead and profit.

Sue’s Corner Market has a markup of 60% on bottled water.

Let us say original price was $x.

Now price after markup is $2.

So we can make an equation like:

original price + markup price = price after markup

x + 60% of x =2

[tex] x + 0.6x =2 [/tex]

[tex] 1.6x =2 [/tex]

dividing both sides by 1.6

x= 1.25

So original price was 1.25 dollars.

Answer:

1.25 dollars.

Step-by-step explanation:

help !! Which represents the solution(s) of the graphed system of equations, y = x2 – 2x and y = –2x – 1?
a (1, –1)
b (0, 0) and (0, –1)
c (0, 0) and (2, 0)
d no solutions

Answers

B is the answer.
y = 0^2 - 2(0) = 0 (0, 0)
y = -2(0) - 1 = -1 (0, -1)

Please help thank you. :P

Answers

1. 20 × 10 mm = 200 mm

2. rotation
.. Try it. The amount of rotation depends on the angle between the lines. It's like looking in two mirrors.

Look at the picture below // 99 points // PLEASEE HELPP

Answers

I'm pretty sure it's D, hope this helps, have an amazing day :)
Lets get started :)

We can divide the large polygon into 3 smaller known polygons 
1 square and 2 rectangles

The dimensions of the square will be:
width: 3 units
length: 3 units 

The dimensions of the 1st rectangle will be:
width: 4 units
length: 7 + 13 = 20 units

The dimensions of the 2nd rectangle will be:
width: 5 units
length: 13 units

The area formula of square is (side)²
A = (6)² = 36 units²

The area formula of a rectangle is (length x width)
A (1st) = 4 x 20
           = 80 units² 
A(2nd) = 5 x 13
            = 65 units²

Now, we add all the areas to get the final area
Area total = 36 + 80 + 65
                 = 181 unit²

Your final answer will be option D

Amy has 12 pairs of white socks, 2 pairs of gray socks, and 6 pairs of black socks in her drawer. if she takes two pairs without replacement, what is the probability that she will take a white pair and gray pair?

Answers

HI!
First of all, there are total 12 + 2 + 6 = 20 pairs of socks.
Probability of getting a pair of white socks the first time is 12/20.
Probability of getting a pair of gray socks without replacement, if first one was white, is 2/19
Therefore the probability that she will take a white pair and gray pair without replacement is 6/95 (I multiplied the two probabilities)
Let me know if there are any other questions!

Simplify the expression. (p^9)^−2

Answers

 p9/p3 Final result : p6 Reformatting the input :

Changes made to your input should not affect the solution:

 (1): "p3"   was replaced by   "p^3".  1 more similar replacement(s).

Step by step solution :Step  1  : p9 Simplify —— p3 Dividing exponential expressions :

 1.1    p9 divided by p3 = p(9 - 3) = p6

Final result : p6

Answer:

[tex](p^9)^{-2}=p^{-18}[/tex]

Step-by-step explanation:

[tex](p^9)^{-2}[/tex]

To simplify the given expression we apply exponential property.

Multiply the outside exponent with inside exponent

[tex](a^m)^n= a^{mn}[/tex]

when we multiply the outside exponent -2 inside 9 , it becomes -18

So the given expression becomes

[tex](p^9)^{-2}=p^{-18}[/tex]

Find the product. (2 p + 7)(3 p - 9)
6 p^2 - 3 p - 63
6 p^2 + 3 p - 63
6 p^2 + 39 p - 63
6 p^2 + 3 p - 2

Answers

p^2(2*3) +p(2*(-9) +3*7) +7*(-9)
= 6p^2 +3p -63

The 2nd selection is appropriate.

Based on the abbreviations, translate the following ads into fully spelled-out sentences. The final sentence should state how many rooms each house probably has, not counting bathrooms. LOW CTM - 2 bdrm 1 ba. Qualifying Low monthly payments 555-834-3674 Norris Realty

Answers

low cash to mortgage, two bedroom one bedroom. ​Qualifying Low monthly payments 
555-834-3674 Norris Realty

Write three functions. In the first function, y should vary directly with x. In the second function, y should vary inversely with x. In the third function, the relationship between x and y should be neither inverse variation nor direct variation.

Answers

Asked and answered elsewhere.
https://brainly.com/question/8880788

1) y = kx . . . . . for some constant k

.. Here y is directly proportional to x , where k is the constant of proportionality


2) y = k/x . . . . for some constant k

.. Here y is inversely proportional to x , again k is the constant of proportionality.


3) y = 2x +52

..

Here y is linearly related to the x , it is neither directly proportional nor inversely proportional.

I need help ASAP! will give Brainliest!
It's geomtery

Answers

Every line segment is an altitude, namely
BD, AB, BC for triangle ABC  (angle B is a right-angle)
BD, AD are altitudes for triangle ABD
BD, DC are altitudes for triangle BDC
So in all, altitudes are
BD,AB, BC,AD,DC.

Using metric relations, 
BD^2=AD*DC=5*7=35
=>
BD=sqrt(35)=5.916 (to 3 decimal places)

Hence the area of triangle ABC
Area=Base*Height/2 = (5+7)*sqrt(35)/2= 35.496 (to 3 decimal places)

Type the correct answer in each box. If necessary, use / for the fraction bar(s). Richard has 3 times as many music CDs as Benny does. If Richard has y CDs, the number of CDs Benny has is given by the expression . If Richard has 30 CDs, Benny has CDs.

Answers

r= 3b

r=y

r=30 cd

b= 10 cds

Answer:

[tex]y=3x[/tex]

when Richard has 30 CDs, Benny has 10 CDs.

Step-by-step explanation:

Richard has 3 times as many music CDs as Benny does.

Let Benny has 'x' CD's.

If Richard has 'y' CDs, the number of CDs Benny has is given by the expression :

[tex]y=3x[/tex]

If Richard has 30 CDs, means y = 30

So, x will be => [tex]30=3x[/tex]

[tex]x=30/3=10[/tex]

So, when Richard has 30 CDs, Benny has 10 CDs.

Find the area of a circle with a circumference of \color{blue}{6\pi}6πstart color blue, 6, pi, end color blue.

Answers

By definition, the circumference of a circle is given by:
 C = 2πR.
 Where,
 R: radius of the circle.
 Substituting we have:
 6π = 2πR
 We cleared R:
 R = (6π) / (2π)
 R = 3
 Then, look for the area of the circle which will be given by:
 A = πR ^ 2
 Substituting the values:
 A = π (3) ^ 2
 A = 9π units ^ 2
 Answer:
 The area of the circle is:
 A = 9π units ^ 2

At combs store there is a 25% chance a customer enters the store within one minute of closing time. Describe the complementary event and find its probability

Answers

The complementary event is that a customer does not enter the store within one minute of closing, and the probability is 75%.

The complement is found by subtracting from 100%; 100-25 = 75%.

I have a Brainliest reward

Answers

The answer to the first question is the last option and the answer to the second question is Balance

And airplanes at altitude change -370 ft over 7 minutes what was the mean change of altitude in feet per minute?

Answers

we have that
 [the mean change of altitude]=[change in altitude]/[time]
 [the mean change of altitude]=[-370]/[7]---------------> -52.86 ft/minute

the answer is -52.86 ft/minute  (the negative sign means that the plane is descending)
Other Questions
Describe the characteristics of two hybrid seeds of the green revolution Which table of ordered pairs represents a proportional relationship The function y= -16t^2 +24t represents the height y (in feet) of a tennis ball bouncing straight up from the ground t seconds after it bounces. After how many seconds does the tens ball return to the ground? Rewrite the sentences making sure to replace the direct object nouns with direct object pronouns (dop). Hints: Dont forget that dops are substitutes for nouns. Dont forget that dops come before the conjugated verb in Spanish. Elsa lleva a su hija con el doctor.____________________________________ Roberto y Marla compran un auto nuevo._____________________________ Uds. preparan la cena. ___________________________________________ Yo compro un regalo. ____________________________________________ Vosotros escribs una carta a la abuela.______________________________ Weights were recorded for all nurses at a particular hospital, the mean weight for an individual nurse was 135 lbs. with a standard deviation of 15. If 19 nurses are selected at random, find the probability that the mean weight is between 125 and 130 lbs Which of these is a characteristic of index fossils? Found in the topmost rock layer Found in many layers of the same rock Have already established relative age Are limited to a particular geographic location The change in __________ is the amount of energy in a system that is available to do work. 3.In a short paragraph, describe the transition of Rome from a republic to an empire. What was the republic like, and what caused it to become an empire?when you answer PLEASE make sure:Answer clearly identifies how the Roman Republic was structured and who it served in Rome.Answer summarizes several of the events, as well as the Triumvirate, and how they led to the collapse of the Roman Republic.NO GUESSING Thank you very much! Fill in the blank with the correct term. A carbohydrate that contains fructose and fiber is . Which social networking site became a gaming platform after 2009? Which of the following are true about alloy steel chains?A.Adapt to the shape of the load B.All statements are true of alloy steel chains C.Best choice for hoisting hot materials D.Must be marked with a grade or manufactures mark How do you find x/2 + x/2 = 8/12 A woman who has not attended school in 13 years enrolls for classes at the local community college. she is afraid that her younger classmates might not accept her. on the first day of class, she observes the clothing styles of her classmates, and after school she goes shopping and purchases similar clothes. her classmates could be considered What is the fifth term of the sequence?an=52n1Enter your answer in the box.a5= Part AHow does Black Hawk use rhetoric in this excerpt to advance his purpose? The sun rose dim on us in the morning, and at night it sunk in a dark cloud, and looked like a ball of fire. That was the last sun that shone on Black Hawk. A) He uses an extended metaphor to convey the magnitude of his sorrow about having to surrender. B) He overstates the importance of his surrender to emphasize that there is a time for concession. C) He uses figurative language and simile to give the audience a sense of what actually happened. D) He repeats a word or expression to emphasize the importance of his personal feelings at a specific moment. Part BHow does the phrase "the last sun that shone" affect the tone of Black Hawks statement in Part A? A) It creates sentimentality as an era passes.B) It establishes urgency as time is running out. C) It conveys finality and hopelessness about the future. D) It creates fear based on the physical chill implied. What is the GCF of the numerator and denominator in the following fraction? -99/1763911They are relatively prime. Which equation is quadratic in form 2(x+5)^2+8x+5+6=0, x^6+6x^4+8=0, 7x^6+36x^3+5=0, 4x^9+20x^3+25=0? What is the solution to the equation g(x) = 3?x = 33 < x < 53 x 43 x < 5 Which of the following statements regarding ethnic identity formation is accurate? A) Experiences of discrimination will only decrease the strength of ones ethnic identity. B) Acceptance of ethnicity is essential for developing a positive or healthy ethnic identity. C) Encounters with individuals demonstrating tolerance for ethnic differences often weaken ones ethnic identity. D) Adolescents who have accepted their ethnic heritage demonstrate lower self-esteem than those who do not. A boat travel 312 miles each way downstream and back. The trip downstream took 13 hours. the trip back took 26 hours. What is the speed of the boat in still water. what is the speed of the current.