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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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today only, a sofa is being sold at a 36% discount. The sale price is $560. what was the price yesterday?
pashok25 [27]

Answer:

Step-by-step explanation:

Let yesterday's price  be x

Discount percentage = 36%

Sale price = $ 560

(100-36)% of x = 560

64 % *x = 560

\frac{64}{100}*x=560\\\\x=560*\frac{100}{64}\\\\x=875

Yesterday's price = $ 875

8 0
3 years ago
A line passes (-8,-2) and has a slope of 5/4. Write an equation in Ax + By=C
klemol [59]

Answer:

5x-4y = -32

Step-by-step explanation:

First write the equation in point slope form

y-y1 = m(x-x1)

y - -2 = 5/4 ( x- -8)

y+2 = 5/4 (x+8)

Multiply each side by 4 to clear the fraction

4( y+2 )= 4*5/4 (x+8)

4y +8 = 5(x+8)

4y+8 = 5x+40

Subtract 4y from each side

8 = 5x-4y +40

Subtract 40 from each side

-32 = 5x-4y

5x-4y = -32

6 0
3 years ago
Read 2 more answers
Help pls!!!
Rasek [7]

Answer:

188.

Step-by-step explanation:

We need to find 77% of 244

77% of 244 is the same as 0.77 * 244

0.77 * 244 = 187.88

He can't make a decimal amount, so you would have to round up to nearest whole number

The answer is 188.

Hope this helps :)

3 0
2 years ago
In trapezoid KLMN, solve for x ,then use that value to solve for
Andre45 [30]

Answer:

<u>Same side angles are supplementary</u>

L+k=180

18x-18+72=180

18x=126

x=7

m∠18(7)-18

= 108°

---------------------

hope it helps...

have a grat day

3 0
3 years ago
Robert has a container in the shape of a cube with an edge length of 6.1 cm. What is the volume of the container? Enter your ans
pickupchik [31]
226.981 I think Because you have to multiply 6.1*6.1*6.1
5 0
3 years ago
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