the function of f (x) is defined by f (x)=4x+7. the inverse of f (x) is g (x). what is g (15)?

Answers

Answer 1

Answer:

g(15) = 2

General Formulas and Concepts:

Pre-Alg

Order of Operations: BPEMDASEquality Properties

Algebra I

Function inverses

Step-by-step explanation:

Step 1: Define

f(x) = 4x + 7

g(x) = f⁻¹(x)

g(15) is x = 15

Step 2: Find inverse

Rewrite:                    y = 4x + 7Swap:                        x = 4y + 7Isolate y term:          x - 7 = 4yIsolate y:                   (x - 7)/4 = yRewrite:                    y = (x - 7)/4Back-substitute:       g(x) = (x - 7)/4

Step 3: Evaluate

Substitute:                    g(15) = (15 - 7)/4Subtract:                       g(15) = 8/4Divide:                          g(15) = 2

Related Questions

HELP PLS. Due in 10 mins

Answers

Answer:

1. Linear

2. Not Linear

3. Linear

4. Linear

Step-by-step explanation:

Function 1

Linear, follow a sequence of 4, 3

Function 2

Not Linear, does not follow a sequence

Function 3

Linear, follow a sequence of 1, 0

Function 4

Linear, follow a sequence of 3, -1

Express 6 3/4 in simplest radical form

Answers

Answer:

4√6^3

Step-by-step explanation:

3 QUESTIONS !



1) I picked a number between 1 and 20. I multiplied my number by 6, added 8, divided it by 4, and then subtracted 5. This resulted in the number 3. What was my number?



2) I selected a number between 40 and 50. I divided my number by 9, subtracted 8, added 6 and then multiplied by 7. This resulted the number 21. What was my original number?


1) I picked a number between 100 and 110. I subtracted 4, added 11, multiplied it by 2, divided it by 6, and then subtracted 8. This resulted in the number 29. What was my original number?





Answers

Answer:

1) 4

2) 45

3) 104

Step-by-step explanation:

1)

let x be your number.

((6x+8)/4)-5 = 3

add 5

(6x+8)/4=8

multiply by 4 to get rid of the denominator

6x+8=32

subtract 8

6x=24

divide by 6

x=4

2) Same type. (this time I won't explain every step)

let x be your number

((x/9)-8+6)*7 =21

(x/9)-8+6=3

(x/9)-2=3

x/9 = 5

x=45

3) Same type... Again

let x be your number

(((x-4+11)*2)/6)-8 = 29

((x-4+11)*2)/6=37

(x-4+11)*2 = 222

x+7=111

x= 104

The sum of the measures of alternate interior angles 4 and 5 of two parallel lines in 210 degrees. What are the measures of these two angles?

Answers

Answer:

105°

Step-by-step explanation:

Since 4 and 5 are equal, 210/2=105°

How to do this question plz answer me ​

Answers

Answer:

x = 6 cm

Step-by-step explanation:

The area (A) of a triangle is calculated as

A = [tex]\frac{1}{2}[/tex] bh ( b is the base and h the height )

Here b = 12 and h = 4, then

A = [tex]\frac{1}{2}[/tex] × 12 × 4 = 6 × 4 = 24 cm²

Then area of parallelogram = 3 × 24 = 72 cm²

The area (A) of a parallelogram is calculated as

A = bh ( b is the width and h the height )

Here b = x and h = 12, thus

12x = 72 ( divide both sides by 12 )

x = 6

The width of the parallelogram is 6 cm

Answer:

6=width

Step-by-step explanation:

Ok so when looking at the question it say that the area of the paraellagram is three times the area of the trianlgle.

-to find the area of a triangle you must use the equation A=1/2LxW would be 24

now once you have 24 you times it by 3 which is 72 (you do this because in the problem it says the paraellagram's area is three times the triangles area so 72 is the paraellagram's area.

now you divide 72 by the only other measurement given to you by the paraellagram which is 12 the length

after dividing the 2 you should get 6 which is the answer

you do this because by dividing 72 by 12 you get the other amount needed to make 72 which was the width

A=1/2(4)x12=24

24x3=7272/12=6

 

Which experesion is equivalent to 5 to the 6th power

Answers

Answer:

15625 is 5 to the power of 6.

You didn't give your answer choices, so I will assume you are referring to the answer.

Step-by-step explanation:

Find the slope of the line without graphing using the 2 points below.



(3 , -10) & (4 , -21)



m = _______

Answers

Answer: m=-11

Step-by-step explanation:

To find the slope of the line, you want to use formula [tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]. Since we are given two points, we can directly plug them in and solve.

[tex]m=\frac{-21-(-10)}{4-3} =\frac{-11}{1} =-11[/tex]

Now, we know that the slope is -11.

What inequality symbol would you use for the following phrase? John needs at least $100 to purchase all the Christmas gifts.

Answers

Greater than to equal to

Select the equation that represents the line that passes through (1,7) and is parallel to y = 5x + 4

Answers

Answer:

a

Step-by-step explanation:

it has to  have to same slope as the first equation so you have y=5x+b then what you do is plug in the points and solve for b. which gives you 2. so your final equation is y=5x+2

7=5+b

-5  -5

2=b

Answer:

The equation that represents the line that passes through (1,7) and is parallel to y = 5x + 4 will be:

[tex]y=5x+2[/tex]

Step-by-step explanation:

Given the equation

[tex]y = 5x + 4[/tex]

Here the slope is:

[tex]m=5[/tex]

as comparing with the [tex]y=mx+b[/tex], which is the slop-intercept form where m is the slope and b is the y-intercept.

As we know the point-slope form is

[tex]y-y_1=m\:\left(x-x_1\right)[/tex]

[tex]y-7=5\left(x-1\right)[/tex]

Add 7 to both sides

[tex]y-7+7=5\left(x-1\right)+7[/tex]

[tex]y=5x+2[/tex]

Therefore, the equation that represents the line that passes through (1,7) and is parallel to y = 5x + 4 will be:

[tex]y=5x+2[/tex]

Can someone help me with the missing ones??

Answers

Answer:

Step-by-step explanation:

3). Definition of midpoint

4). Midpoint theorem ( ≅ parts are = )

7). Division Property of Equality.

8).  QR = 5 + 2 = 7     Substitution x by equal value

9). PQ = 4(2)  - 1 = 7    Substitution x by equal value

10). Segment addition postulate

11). Substitution

Find the volume of a rectangular fish tank with dimensions of 14 feet long,8 feet wide, and 6
feet deep. The volume of the fish tank is blankcubic feet. Enter only the number

Answers

672

i need 29 characters that’s why I’m typing this part

A store sells ½ pound of beef for $0.70. If you are having a party and need 6 pounds of beef for hamburgers, using the unit rate, how much would i cost? Explain.

Answers

Answer:

$8.40

Step-by-step explanation:

A store sells ½ pound of beef for $0.70

We find the unit rate

1/2 pound = $0.70

1 pound =

We cross Multiply

1/2 × x = 1× 0.70

x = 0.70 ÷ 1/2

x = 0.70 × 2/1

x = $1.40

The unit rate for 1 pound of beef is $1.40

If you are having a party and need 6 pounds of beef for hamburgers

Hence, the cost for 6 pounds of beef is:

1 pound = $1.40

6 pounds = y

y = 6 × $1.40

y = $8.40

6 pounds of beef for hamburgers would cost $8.40

WILL GIVE BRAINLIEST The knitting club sold 40 scarves and hats at a winter festival and made $700 from
the sales. They charged $18 for each scarf and $14 for each hat.
If x represents the number of scarves sold and y represents the number of hats
sold, how many scarves and hats did the knitting club sell at the winter festival?
I NEED HOW MANY SCARVES AND HATS WERE SOLD NOT THE SOLUTION

Answers

Answer:

s+h=40 and 18s+14h=700

Step-by-step explanation:

lets say  

s= number of scarves sold  

and  

h=number of hats sold  

since the total of hats/scarves equals 40 then that means that scarves+hats sold equals 40 so  

s+h=40  

the second constraint it found similarly,

scarves and hats are being sold for 18$ and 14$ respectively and together they need to equal 700$ so you plug it into a similar equal as before  

18s+14h=700              

A vehicle travels 57 kilometers north and then travels 26 kilometers south. What is the current position of the vehicle? (2 points) a 26 kilometers south of its starting location. b 83 kilometers from its starting location. c 31 kilometers north of its starting location. d 83 kilometers north of its starting location.

Answers

Answer:

C. 31 kilometers north of its starting location

Step-by-step explanation:

Please see attached a rough sketch of the situation for your reference.

Step one:

Displacement North= 57km

Displacement South= 26km

Required

The  final displacement

The current position is attained by subtracting 26km from 57km

=57-26= 31km

Therefore the current position is

C. 31 kilometers north of its starting location

Answer:

C

Step-by-step explanation:

Tyler swims at a constant speed, 6 meters every 4 seconds. How long does it take him to swim 114 meters?

Answers

Answer:

91.2 seconds

:)

Answer:

76 seconds (1:16 one hour and 16 minutes)

Step-by-step explanation:

You take the distance that he has to travel (114m) and you divide it by the distance you're given that he is moving at every time (6m). this gives us 19. Then you take that and multiply it by how many seconds it takes him to move the given 6m (4s), which gives us an answer of 76 seconds

what is the answer to this problem? 7(g+5)=105

Answers

Answer:

g = 10

Step-by-step explanation:

Distribute 7 to the parentheses:

7(g + 5) = 105

7g + 35 = 105

Solve for g:

7g + 35 = 105

7g = 170

g = 10

So, the answer is g = 10

Answer:

g = 10

7g + 35 = 105

.       -35    -35

7g = 70

g = 10


What’s the value for y?

Answers

Y=3(2)-2
Y=6-2
Y=4
The value of y is 4.
i agree with sujeidi

Noah makes an açaí bowl using 1/4 cup of bananas for every 1/3 cup of apple juice. He wants to know the number of cups of bananas per cup of apple juice he uses when making the bowl. Which ratio of cups of bananas to cups of apple juice is equivalent to 1/4: 1/3 ?

Answers

Answer:

3/4 cup of bananas per cup of apple juice.

Step-by-step explanation

1/4 = 1/3x, then solve for x.

1/4 * 3/1 = x

3/4 = x

Ratio of cups of bananas to cups of apple juice is 3 : 4.

What is Ratio?

A ratio indicates how many times one number contain in another

number.

Given that;

Noah makes an bowl using 1/4 cup of bananas for every 1/3 cup of apple juice.

Now,

Ratio of cups of bananas to cups of apple juice = 1/4 : 1/3

                                                                           = 1/4 ÷ 1/3

                                                                           = 1/4 × 3/1

                                                                           = 3/4

                                                                           = 3 : 4

Thus, Ratio of cups of bananas to cups of apple juice is 3 : 4.

Learn more about the ratio visit:

https://brainly.com/question/19994681

#SPJ5

2^?=1/8
What is the question mark

Answers

Answer:

3 is the question mark my friend u just have to simply

Answer:

-3

Step-by-step explanation:

2^x = 2^-3

x= -3

i hope this helps !!

verifying identity plz help!
Sin(x+y) sin(x-y)=sin²x-sin²y​

Answers

Answer:

Step-by-step explanation:

sin(x+y) = sin(x)cos(y) + sin(y)cos(x)

sin(x-y) = sin(x)cos(y) - sin(y)cos(x)

Sin(x+y)sin(x-y) = (sin(x)cos(y) + sin(y)cos(x))(sin(x)cos(y) - sin(y)cos(x))

= sin^2(x)cos^2(y) - sin^2(y)cos^2(x)

= sin^2(x)(1-sin^2(y)) - sin^2(y)(1-sin^2(x))

= sin^2(x) - sin^2(x)sin^2(y) - sin^2(y) + sin^2(x)sin^2(y)

= sin^2(x) - sin^2(y)

So L.H.S=R.H.S

Hence proved

Consider functions f and g.
f(x)=3 √x + 1

x g(x)
1 --------> 0
2 --------> 1
3 --------> 4
4 --------> 9

What is the value of f(g(1))?

A) 3√2+1
B) 9
C) 0
D) 1

Answers

Answer:

D) 1

Step-by-step explanation:

Given functions f and gf(x) = 3 √x + 1g(x) given as tableTo findf(g(1))Solution

As per table

g(1) = 0

So

f(g(1)) = f(0) = 3√0 + 1 = 0 + 1 = 1f(g(1)) = 1

Correct option is D) 1

Solve for x. Round your answer to 2 decimal places. (See image)

A. 32.08
B. 14.42
C. 9.01
D. 20.05

Answers

Answer:

A. 32.08

Step-by-step explanation:

The figure given is a right triangle. We would apply trigonometric ratios formula to find x.

Reference angle = 58°

Hypotenuse = x

Adjacent length = 17

Thus, we would apply the following:

[tex] Cos(\theta) = \frac{Adjacent}{Hypotenuse} [/tex]

Plug in the values

[tex] Cos(58) = \frac{17}{x} [/tex]

Multiply both sides by x

[tex] Cos(58) \times x = \frac{17}{x} \times x [/tex]

[tex] Cos(58) \times x = 17 [/tex]

Divide both sides by Cos(58)

[tex] \frac{Cos(58) \times x}{Cos(58)} = \frac{17}{Cos(58)} [/tex]

[tex] x = \frac{17}{Cos(58)} [/tex]

[tex] x = 32.08 [/tex] (2 d.p)

Jessica is collecting aluminum cans during the summer for a recycling project. She collected 120 aluminum cans in June and 150 aluminum cans in July.

What is the percentage change of the number of cans she collected in June to the number of cans she collected in July?
A.
a 25% increase
B.
a 25% decrease
C.
a 20% decrease
D.
a 20% increase

Answers

Answer:

25%

Step-by-step explanation:

Answer:

25%

Step-by-step explanation:

Bc you are adding 1/4 of 120 which equals 150

I need to find out how many kilometers mikalea can run in 1 hour

Answers

Answer:

I think its 10km in 1 hour.

Step-by-step explanation:

mikaela is running 5mg in 0.5 hours, but your looking for an 1 hour so you double it.

At her job at the local bakery, Jessica makes 45 cookies a week. This is 3/5 of the total cookies made at the bakery for the week. Use the equation 3/5x=45, where x = number of cookies baked, to find out how many cookies are baked at the bakery each week.

Answers

Answer:

the ansewr is 5

Step-by-step explanation:

1 plus 1 equal 5555555

HELP ME PLS
(I have the answers I just need to show the work and that’s it)

Answer: B

Answers

Answer:

Im dumb but cant you just be like, I subtracted 146° and 62°?

The second part of D is 180-146=34
The triangle 180-34-62=?
?= 84

what expression will be equivalent to m+m+m+m+m+m+k+k

Answers

Answer:

Possible answer:

6m + 2k

Step-by-step explanation:

given:

m+m+m+m+m+m+k+k

we can attempt to simplify this expression by factorization:

(m+m+m+m+m+m)+(k+k)     factorize m's and k's

= m(1+1+1+1+1+1) + k(1+1)

= 6m + 2k

PROBLEM: (IF YOU TROLL I WILL REPORT) Riley has a rectangular shaped patio that is 13 feet long by 15 feet wide. He wants to DOUBLE THE AREA of the patio by increasing the length and width by the same amount. (200 POINTS)

1. Write an EQUATION that represents the total area of Riley's proposed patio.

2. To the NEAREST TENTH of a foot, what is the LENGTH and WIDTH of the new patio?

THANK YOU!!

Answers

Answer:

Part A)

[tex]390=(15+x)(13+x)[/tex]

Part B)

Approximately 18.77 feet long by 20.77 feet wide.

Step-by-step explanation:

Currently, the patio is 13 feet long by 15 feet wide. Therefore, the area right now is:

[tex]A=13(15)=195\text{ feet}^2[/tex]

We will increase the length and width of the patio by the same amount such that the new area is double the previous amount.

Part 1)

The previous area is 195. Therefore, we would like to the new area to be twice of that. Hence, the new area is:

[tex]A=2(195)=390[/tex]

We will increase the length and the width by the same amount. Let’s call this amount x. Then by the area formula (A=bh), we can write:

[tex]390=(15+x)(13+x)[/tex]

390 represents the doubled area. (15+x) is the width after the increase x, and (13+x) is the length after the same x increment.

Part 2)

So, we will solve for x. First, expand:

[tex]390=195+15x+13x+x^2[/tex]

Simplify:

[tex]x^2+28x+195=390[/tex]

Subtract 390 from both sides:

[tex]x^2+28x-195=0[/tex]

This is a quadratic. Hence, we can use the quadratic formula:

[tex]x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}[/tex]

Our a=1, b=28, and c=-195. Hence:

[tex]x=\frac{-28\pm\sqrt{(28)^2-4(1)(-195)}}{2(1)}[/tex]

Evaluate:

[tex]x=\frac{-28\pm\sqrt{1564}}{2}[/tex]

Simplify the square root:

[tex]\sqrt{1564}=\sqrt{4}\cdot\sqrt{391}=2\sqrt{391}[/tex]

Hence:

[tex]x=\frac{-28\pm2\sqrt{391}}{2}\\[/tex]

Simplify:

[tex]x=-14+\sqrt{391} \text{ or } -14-\sqrt{391}[/tex]

Approximate:

[tex]x\approx5.77\text{ or } x\approx-33.77[/tex]

In this case, we can reject the negative solution.

Hence, the value of x is 5.77.

This means that we should increase the our length and width by 5.77.

Hence, the new length will be 13+5.77 or about 18.77.

And our new width will be 15+5.77 or about 20.77.

So, the new dimensions is approximately 18.77 by 20.77

The population of bobcats in northern Arizona since 2008 can be modeled using the function b(t) = –0.32t2 + 2.7t + 253. What does t represent? What is the domain for this function? Which range values would not make sense for this function? Would the graph be continuous or discrete, and why?

Answers

Answer:

See below.

Step-by-step explanation:

t represents time (probably years).

The population of bobcats can't be negative, so negative values in the range do not make sense.

The function is continuous, but you're probably only looking at discrete values.

Answer:

1.the number of years since 2008

2.t values greater than or equal to 0

3.negative values

4.discrete,because number of bobcats cannot be broken to fractional parts

Step-by-step explanation:

Just got them all correct on Edge

The First-person to get correct will get BRAINLESIT

I think of a number, multiply it by four, and subtract three. I get eleven. a) Using the statement above, form an equation. Use the letter 'x' for the unknown number.
b) Solve the equation

Answers

The answer is X=3.5. 4 times 3.5 is 14-3 you get 11
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