3 years ago

What is an irrational number? and what are some examples

Mathematics

1 answer:

Gekata [30.6K]3 years ago

7 0

A rational number is any number that can be expressed as the quotient or fraction

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F(x)=2x+1/x-1 then f^-1(1)

olasank [31]

Answer:

f⁻¹(x) = (x + 1) / (x - 2)
f⁻¹(1 ) = - 2

Step-by-step explanation:

Given function:

f(x) = (2x + 1) / (x - 1)

Find its inverse, substitute x with y and f(x) with x, solve for y:

x = (2y + 1) / (y - 1)
x(y - 1) = 2y + 1
xy - x = 2y + 1
xy - 2y = x + 1
y(x - 2) = x + 1
y = (x + 1) / (x - 2)

Substitute y with f⁻¹(x):

f⁻¹(x) = (x + 1) / (x - 2)

Find f⁻¹(1 ):

f⁻¹(1 ) = ( 1 + 1) / (1 - 2) = 2 / - 1 = - 2

6 0

2 years ago

The rate at which a plant grows is constant. At the 3rd week it is 12 inches tall and at the 5th week it is 20 inches tall. If t

satela [25.4K]

Answer:

Step-by-step explanation:

3 (week), 12 (inches)

(3,12) = (1,4)

(x,y)

x=1

y=4

Ans- y=4

7 0

3 years ago

Which expression represents the word phrase six decreased by one third of a number?

sergij07 [2.7K]

Answer: 6-1/3n

Step-by-step explanation:

4 0

3 years ago

If kevin makes c toys in m minutes, how many toys can he make per hour

mina [271]

Answer:

$\frac{60c}{m}$

Step-by-step explanation:

We can use the unity rule to solve this problem.

Number of toys made in m minutes = c

Number of toys made in 1 minute = $\frac{c}{m}$

Number of toys made in 60 minutes = $\frac{c}{m} \times 60 = \frac{60c}{m}$

Since 60 minutes = 1 hours, we can write:

Number of toys made in 1 hour = $\frac{60c}{m}$

Therefore, we can say that Kevin makes $\frac{60c}{m}$ toys per an hour.

7 0

3 years ago

The atomic mass unit (amu) is a unit used to represent the blank of an atom.

aleksandrvk [35]

Answer:

the answer is no

Step-by-step explanation:

5 0

3 years ago

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