Let f(x) = x2 − 81. Find f−1(x)

Answer:

2√15 is your answer . Hope this helps you.

Answer:

2[tex]\sqrt{} 15[/tex] (decimal 7.74596)

Step-by-step explanation:

That sign is called a radical sign used to find square roots so it is used to extract or find the index of the number in this case the answer to that question

So you have

√6 √5 √2 first you find the value of the first number my finding the square root

(by changing the number into a decimal and using long division is the method i use)

Since √6 is √3 and √2 then you put them together like so

√2 √3 √5 √2

then you apply radical rule

(which the formula is √a √a = a,   a>0)

in this case it is √2 √2 = 2

and that equals

2 √3 √5

Apply radical rule again

(now that we did the formula the first time the formula changes now it is √a √b = √ab,    a>0, b>0)

now it is

2√3 x 5

now you just multiply 3 and 5and get 15

then you get

2[tex]\sqrt{} 15[/tex] (decimal 7.74596)

Hope it helped, please mark brainliest if did

Answer:

If your shape is a regular polygon (such as a square in the example above) then it is only necessary to measure one side as, by definition, the other sides of a regular polygon are the same length. It is common to use tick marks to show that all sides are an equal length.

Step-by-step explanation:

Hope it helps love form india server

Answer:

they usually have double line on top of the lines of the shapes. for example square they have all the same lenght so they have double line signs on top of them

i hope this help. good luck

Answer:

Coordinates are numbers which determine the position of a point or a shape in a particular space (a map or a graph).

In primary school children are taught Cartesian coordinates, which they are introduced to in Year 4. Points are marked by how far along they are on the x axis (the horizontal axis) and how far up they are on the y axis (the vertical axis).

Step-by-step explanation:

Answer:

200 ft

Step-by-step explanation:

area = 2500

length = 50

Answer:

1) 130 degrees and 50 degrees 6) a price of a chair is 40, a price of the table is 80 7) a) 16 b)28

Step-by-step explanation:

1) Let it be that the first angle is x, The second one is y

1/5(x+y)=36- the first equation

1/2(x-y)=40- the second equation

The equations are simultaneous

x+y=180   and x-y=80

x+y+x-y=180+80

2x=260

x=130

y=50

6) The cost of a chair is x, the cost of table is y

6x+3y=480  2x+y=160

8x+y=400

8x+y- (2x+y)=400-160

6x=240

x=40

2*40+y=160

y=80

7) The Wan's age is x, the mother's age is y

x+y=60 x=60-y

Two years ago mother's age was y-2, when Wan;s age was x-2

y-2=(x-2)*3

y-2= (60-y-2)*3

y-2= (58-y)*3

y-2=174-3y

4y=176

y= 44

x=60-44=16- Wan's age now

44-16=28- her mother's age when she was born

Answer:

1500 calories

Step-by-step explanation:

2400 is 100% of in this case, 8/8

So then we know that 1/8 of 2400 is 300 because we just divide it by 8. Sarah eats 5/8 that much so we multiply 300 by 5 which gives us 1500

Answer:

2400 x 5/8 = 1500

Step-by-step explanation:

Just multiply the fraction they gave u

Answer:

8

Step-by-step explanation:

-16-8=8

Answer:

[tex]8 \frac{9}{10} [/tex] (first option)

Step-by-step explanation:

[tex] - 4 \frac{1}{5} - ( - 13 \frac{1}{10} )[/tex]

[tex] - \frac{21}{5} + 13 \frac{1}{10} [/tex]

[tex] - \frac{21}{5} + \frac{131}{10} [/tex]

[tex] \frac{89}{10} = 8 \frac{9}{10} [/tex]

Answer:

18,000 at 2%

22,000 at 3%

Step-by-step explanation:

x: the amount in account paying 2% interest

y: the amount in stock paying 3% interest

x + y = 40,000

2%. x + 3%. y = 1020

⇒ x = 18,000

y = 22,000

Answer:

Step-by-step explanation:

Answer:  x = 35

Step-by-step explanation:  The sum of all the angles is equal to 360.

2*(x+y+5)+y+2x=360

Opposite angles are equal:  y = 2x

Substitute y=2x into the first:  4x+6x+10 = 360:  x=35 (y = 70)

So first you could need to find the x and y intercepts.

So the x intercept can be found why y is zero and vice versa.

so your graph would go through the points (0,5) and (2.5,0)

Answer:

1/8

Step-by-step explanation:

Answer: slope = 4/3

Step-by-step explanation:

(24-12)/(6- -3)

= 12/9

= 4/3

Answer:

Answer is 0.67 rounding up

Answer:

A

Step-by-step explanation:

Because 8's place value is the ones , 3's place value is the tenths and 4's place value is the hundredths.

Example > 0.1 = tenths slot. 0.01 = hundredths slot. 0.001 = thousandths slot. 0.0001 = ten thousandths slot.

Your welcome pooh.

Answer:

He will pay $1,771 more than the actual price.

Step-by-step explanation:

260 x 36 = 9360

9360 - 7589

= $1,771

Answer:

A is the answer

rrrrrrrr

Answer:

Wouldn't be 100% since all the numbers on a standard number cube are less than 7?

Step-by-step explanation:

Answer:

58

Step-by-step explanation:

only 3 people ordered seafood so u add 43 12 and 3

SORRY IF I AM WRONG

Answer:

6/5

Step-by-step explanation:

We can use the slope formula to find the slope

Slope formula: [tex]m = \frac{y_2-y_1}{x_2-x_1}[/tex], where the x and y values are derived from know points

The points chosen can vary as there are many given but the ones I chose were (6,9) and (11,15)

Now that we chose two points we want to define the variable ( the variables are x2, x1, y2 and y1 )

Define Variables

x1 = x value of first point which would be 6

x2 = x value of second point which would be 11

y1 = y value of first point which would be 9

y2 = y value of second point which would be 15

Now that we have defined our variables the next step is to plug in the variables into the slope formula

slope formula: [tex]m = \frac{y_2-y_1}{x_2-x_1}[/tex]

y2 = 15, y1 = 9, x2 = 11 and x1 = 6

* plug in values *

[tex]m=\frac{15-9}{11-6}[/tex]

subtract top numbers

[tex]m=\frac{6}{11-6}[/tex]

subtract bottom numbers

[tex]m = \frac{6}{5}[/tex]

there is no simplification needed meaning that the slope in simplest form is 6/5

Answer:

95+d

Step-by-step explanation:

Answer:

2 hours and 47 minutes.

Step-by-step explanation:

If it makes it easier then translate it to normal time.

10:45 pm and 1:32 am.

2 hrs and 47 minutes.

Answer:

2 hours and 47 minutes is the duration of the movie.

Step-by-step explanation:

I have calculated it :-)

Answer:

yea I cant really do this over a screen

Answer:

16) photo

Step-by-step explanation:

- parallel lines never meet (a, b, c have no points in common)

- perpendicular lines meet other lines at one point, forming two angles of 90 °

Answer:

2(x+1)

Step-by-step explanation:

I think it's work.

Answer:

-2

Step-by-step explanation:

Answer:

computer is an electronic machine which process raw data and gives meaningful information to the user.

Answer:

A computer is an electronic machine which accepts raw data process them and give meaningful information to the user

have a great day ☺