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Kobotan [32]
3 years ago
13

How many numbers are reciprocal of themselves?

Mathematics
1 answer:
const2013 [10]3 years ago
6 0

Answer:

  two: +1 and -1

Step-by-step explanation:

If a number is equal to its own reciprocal, it will satisfy the equation ...

  x = 1/x

Multiplying by x and subtracting 1 gives ...

  x^2 -1 = 0

This factors as ...

  (x -1)(x +1) = 0

By the zero product rule, the solutions are those values of x that make one or more factors zero:

  x = 1

  x = -1

There are two self-reciprocals.

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Jimmy has 26,387
Anni [7]

Answer:

263,870

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
If a bicycle wheel has a diameter of 21 inches what the exact circumference?
Blababa [14]

Answer:

Circumference = 65.97344573

Step-by-step explanation:

Given the diameter of a circle, we can use the formula C = πd to find the circumference.

C = circumference

π = pi

d = diamater

Equation: 21(π) = 65.97344573

Make sure to round to whatever decimal place is asked for!

6 0
3 years ago
PLEASE HELP PICTUREE BELOWWW
Kazeer [188]

3y+7=31

3y=24 (we subtracted 7 from both sides)

24 divided by 3 is 8

Y=8

5 0
3 years ago
calculate the distance between the points E=(-1,-5) and F=(-8,1) in the coordinate plane. Give an exact answer (not a decimal ap
Elena L [17]

Answer:

The answer is

<h2>\sqrt{85}  \:  \:  \:  \: units</h2>

Step-by-step explanation:

The distance between two points can be found by using the formula

d =  \sqrt{ ({x_1 - x_2})^{2} +  ({y_1 - y_2})^{2}  } \\

where

(x1 , y1) and (x2 , y2) are the points

From the question the points are

E(-1,-5) and F(-8,1)

The distance between them is

|EF|  =  \sqrt{ ({ - 1 + 8})^{2}  +  ({ - 5 - 1})^{2} }  \\  =  \sqrt{ {7}^{2}  +  ({ - 6})^{2} }  \\  =  \sqrt{49 + 36}  \:  \:  \:  \:  \:  \:  \:  \\  =  \sqrt{85}  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:

We have the final answer as

\sqrt{85}  \:  \:  \:  \: units

Hope this helps you

7 0
4 years ago
pencils come in cartons of 24 boxes. a school bought 50 cartons of pencils for the start of school. each box of pencils cost $2.
Sergio039 [100]
If each carton has 24 boxes and each box cost $2. Then you would multiply 24*2=48 and then do 48*50 which equals $2,400.
6 0
3 years ago
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