2 years ago

The mean age of five people in a room is 24. One of the people (age 40) leaves the

Mathematics

2 answers:

juin [17]2 years ago

7 0

Answer:

thxss for the points love

Step-by-step explanation:

kisses

dezoksy [38]2 years ago

3 0

Answer:

Step-by-step explanation:

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What is the inverse of the function f(x) = 2x + 1?

Alexandra [31]

Answer:

$f^{-1}$ (x) = $\frac{x-1}{2}$

Step-by-step explanation:

let y = f(x) and rearrange making x the subject, that is

y = 2x + 1 ( subtract 1 from both sides )

y - 1 = 2 ( divide both sides by 2 )

$\frac{y-1}{2}$ = x

Change y back into terms of x and let x = $f^{-1}$ (x), thus

$f^{-1}$ (x ) = $\frac{x-1}{2}$

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2 years ago

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Elis [28]

There are 6 squares so u multiply 6x3=18 is the total surface area

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3 years ago

How many Solution(s) does have 5=5? <br> Infinite, none, or one solution(s)?

Nataly [62]

Answer:

infinite solutions

Step-by-step explanation:

any equation that is like that has infinite solutions such as 7=7 or 2=2

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2 years ago

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Blababa [14]

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2 years ago

A building engineer analyzes a concrete column with a circular cross section. The circumference of the column is 18 \pi18π18, pi

Whitepunk [10]

Answer:

$A=81\pi $ m^2$

Step-by-step explanation:

Circumference of the column $=18\pi $ meters$

Circumference of a circle $=2\pi r$

Therefore:

$2\pi r =18\pi $ meters\\2r=18\\r=18 \div 2\\$Radius, r=9 meters$

Area of a Circle $=\pi r^2$

Since radius of the cross section of the column =9 meters

Area of the cross section of the column

$=\pi *9^2\\=81\pi $ m^2$

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3 years ago