The mean age of 5 people in a room is 31 years.
A person enters the room.
The mean age is now 30.
What is the age of the person who entered the room?​

Answers

Answer 1

Answer:

25 year

Step-by-step explanation:

Mean = sum/no. *of observations

Initially, number of people = 5 & let the sum of their ages be S.

=> 31 = S/5

=> 155 = S

When one more entered, number = 6. Let his age be 'a'.

Sum of ages = S + a = 155 + a

=> 30 = (155 + a)/6

=> 180 = 155 + a

=> 25 = a


Related Questions

8. You throw a ball downward 40 feet per second from a building
that is 256 feet above the ground. How long will it take
the ball to hit the ground?

Answers

Answer:

6.16?

Step-by-step explanation:

Not completely sure but if you divide 256 by 40 you get six remainder 16 not sure if I did it right so sorry if I am wrong

Find the volume of each figure. PLZZZ I NEED HELP ASAP!!!!!! :/

Answers

8) v=1/3 x 6^2 x 11
= 132cm^3

10) 80ft^3

11) 72km^3

Hope this helps!!

Which graph represents the solution for the equation 3x + 2 = 5x?
**+

Answers

I believe the answer is A because 3x is basically 3 on the x axis plus 2 and that graph have the lines meet at 5x

Help I need to do that I don’t even know what it is I’ll
Give brianliest

Answers

Answer:

Step-by-step explanation:

1. f(x) = 5x² + 3x - 1

a. f(0) = 5·0² + 3·0 - 1 = -1

b. f(-1) = 5(-1)² + 3(-1) - 1 = 1

Do the same for f(2), f(√2), f(a+2), and f(a).

Then do the same thing for the next function.

2. f(x) = x/(1-x)

a. f(0) = 0/(1-0) = 0

Do the same for f(-1), f(2), f(√2), f(a+2), and f(a).

If you watched any or both of these movies, make a 5 sentence summary about it

(ill give brainly and 25 points) :)

Answers

Answer:

Disney The Jungle Book (the first one): Mowgli (played by Neel Sethi) is a young boy that was raised by a family of wolves. One day he has to leave his home when the fearsome tiger, named Shere Khan (voiced by Idris Elba) unleashes a powerful roar. With aid from a panther (voiced by Ben Kingsley) and a care-free bear (voiced by Bill Murray), Mowgli meets a ton of new jungle animals. A few of which include a slithery python and a friendly ape. Along his way, Mowgli learns valuable lessons about life in this movie full of fun and adventure.

The Jungle Book (the second one): This is a classic Walt Disney animation that is based on Rudyard Kipling's book. Mowgli is a young, abandoned child who was raised by wolves. One day his peaceful life is threatened by the evil tiger, named Shere Khan (voiced by George Sanders). Mowgli must leave his wolf family behind in order to return to the "man village." Throughout his quest he is not alone, aided by a panther named Bagheera, and later on, a carefree bear named Balloo, he traverses the jungle's many perils.

Step-by-step explanation:

Hope this helps :)

pls help. i need help doing this problem and have been going at it for the longest. this is algebra II.

Answers

N in the equation is the number of times it compounds in a year. Since it is compounded yearly n = 1.

A = 1000( 1+ 0.08/1)^(7x1)

A = 1000(1.08)^7

A = $1,713.82

They will have $1.713.82 after 7 years

Chords and arcs
Find the value of x.

Answers

Answer:

The answer is 2

As we can see lineAB is the same as lineCD

2) Select one of your sides.
Side: Nachos Price: 3.00
Your cost to make this side just became
cheaper. As a result, you are going to
decrease the price by $0.25. What is
the percent of change ?
Answer:

Answers

Answer: 3.00$-.25¢= 8.5% discount

A bird can lay either white or brown eggs. Three white eggs
and
two brown eggs have a mass of 13 grams, while five white eggs
and four brown eggs have a mass of 24 grams. Find the mass
of a brown egg and of a white egg.

Answers

Answer:

Mass of brown egg = 3.5 grams

Mass of white egg = 2 grams

Step-by-step explanation:

Let

Mass of brown eggs = x

Mass of white eggs = y

3y + 2x = 13 (1)

5y + 4x = 24 (2)

Multiply (1) by 5 and (2) by 3 to eliminate y

15y + 10x = 65 (3)

15y + 12x = 72 (4)

Subtract (3) from (4)

12x - 10x = 72 - 65

2x = 7

x = 7/2

x = 3.5

Substitute x = 3.5 into (1)

3y + 2x = 13 (1)

3y + 2(3.5) = 13

3y + 7 = 13

3y = 13 - 7

3y = 6

y = 6/3

y = 2

Mass of brown egg = 3.5 grams

Mass of white egg = 2 grams

Six equal blocks have a total mass of b kg. What is the mass of each block?.​

Answers

One block / total mass of the six blocks

1 / b kg

Which point is located at (2, 3)?
A
B
C
D

Answers

Answer:

a

Step-by-step explanation:

The answer is point c

Mark the absolute maximum point of the graph

Answers

(7,7) is the maximum point in the graph. This is because it is the highest shown point that is above 0.

Brainliest???

Colin can type 30 words in a minute How many words can be typed in 2.5 minutes?

Answers

Answer:

75 words in 2.5 minutes

Step-by-step explanation:

30 words - 1 min

60 words - 2 min

30/2 = half a minute

=15

60+15=

75 words

el tema es desigualdades con valor absoluto

Answers

Answer:

i need english

Step-by-step explanation:

find the y-coordinate of the y-intercept of the polynomial function defined below f(x)=2x(x^2+3)

Answers

Answer:

y-intercept is (0,0). Mark brainliest?

Answer:

Step-by-step explanation:

2x([tex]x^{2}[/tex] + 3)

when x = 0 then we have a y intercept

2[tex]x^{3}[/tex] +6x

so b/c both terms have an x  in them

we know the only time this function hits the y intercept is when y is zero

got it?

answer y = 0

Find the volume of the sphere .

Answers

Answer:

1436.8cm³

Step-by-step explanation:

Formula :

[tex] \frac{4}{3} \times \pi \times r ^{3} [/tex]

[tex] \frac{4}{3} \times \pi \times 7^{3} [/tex]

=1436.75504cm³

to 1dp

=1436.8cm³

Which shows the correct solution of the equation a
1/2a + 2/3b=50, when b=30?

Answers

The correct solution of the equation 1/2 a + 2/3b = 50 when b=30 is a = 60.

Answer:

c.) a = 60

explanation:

This is the only work that is correctly shown, if you are doing edg, hope it helps!

Simplify (3v^5+8v^3−10v^2 )−(−12v^5 +4v^3+14v^2 ) . Write answer in standard form.
please help

Answers

Answer

15v^5+4v^3-24v^2

How many 1-foot-square border tiles would you need to surround a pool
that is 10 feet long and 5 feet wide? *

Answers

34

It is 34 because it is
10+10+5+5=30
when it comes to simply the edge lengths but to completely surround the pool you would need the 4 extra tiles on the corners which makes it
10+10+5+5+4=34

f(x)=4x-3, g(x)=10-x
Work out gf(x)?

Answers

Step-by-step explanation:

Given

f(x) = 4x - 3

g(x) = 10 - x

So Now

gf(x) = g( 4x - 3)

= 10 - 4x + 3

= 13 - 4x

Hope it will help :)❤

y= 2 over 3 x + 20 when x= 21

Answers

Answer:

y=1262 /63 or y=20 and 2/63

Step-by-step explanation:

plug 21 into the equation to get y=2/3(21)+20

PLEASE HELP DO SOON!!!
What is the length of CD?
What is the length of AB? Round answer to the nearest hundredth.

Answers

Answer:

CD=14AB=9.17

Step-by-step explanation:

to understand thisyou need to know about:circlelet's solve:

according to the question

DF×DG=CD×DEsubstitute the value of DF,DG, and DE:3×4=CD×2simplify multiplication:12=2CDsimplify substraction:2CD/2=12/2therefore CD=6

SECOND QUESTION:

first find the measure of BE

6+2+612+214

according to the question

AB²=BE×BC

square both sides

[tex]\sqrt{AB^{2}}=\sqrt{BE\times BC}[/tex][tex]AB=\sqrt{BE\times BC}[/tex]

substitute the values of BE and BC

[tex]AB = \sqrt{14 \times 6} [/tex]

simplify multiplication:

[tex] \sqrt{84} [/tex]

simplify redical:

9.17

what is -2/3 times -12. This questions is related to converting slope point form into slope intercept form.

Answers

Answer:

-2/3 times  -12=8

Step-by-step explanation:

(x - 12y = -4
( x - 9y = 7

Answers

9514 1404 393

Answer:

  (x, y) = (40, 11/3)

Step-by-step explanation:

The variable x can be eliminated by subtracting the first equation from the second.

  (x -9y) -(x -12y) = (7) -(-4)

  3y = 11 . . . . . . .simpify

  y = 11/3 . . . . . .divide by 3

  x -9(11/3) = 7 . . . . substitute for y in the second equation

  x = 40 . . . . . . . add 33

The solution is (x, y) = (40, 11/3).

Find the slope of the line that passes through each of the following pairs of points:
(-1,4) and (3,-8)

Answers

Answer:

-12/4

Step-by-step explanation:

Use the slope formula

y2-y1. -8-4

---------- ______ = -12/4

x2-x1. 3-(-1)

A company sells widgets. The amount of profit, y, made by the company, is related to
the selling price of each widget, x, by the given equation. Using this equation, find out
what price the widgets should be sold for, to the nearest cent, for the company to
make the maximum profit.
3032 + 13251 – 8569

Answers

Answer:

bad expression

Step-by-step explanation:

13251+3032−8569=7714

8. By using coupons, Mary Jo is able to decrease the retail price of her groceries, g, by $125. you find the nroduct of the base and height and then divide by 2. Expression. ​

Answers

Answer:

is there more to it? if not i dont understand what they are asking.

Step-by-step explanation:

If two lines have the same y intercept and the same slope will they intercept at exactly one point?


True or false or partly true

Answers

Answer:

False because the lines would be going somewhat in this direction // both lines would be like that so they wouldnt intercept unless the lines were to go like /\ then they would intercept

Find KL. URGENT!!!!!!

Answers

KL = 27------------------------------

Step-by-step explanation:

JM = 27 ---- ( given )

JM = KL

so, KL = 27

------------------------------FOLLOW ME

Lani opened a savings account with
$450. She saves $225 per month. Which
equation shows how many months, m,
Lani would have to save to have a total of
$1575 in her account?
A 1575=-450/225
B 1575 = 450m +225m
C 1575 = 450 +225m
D 1575 = 225 +450m

Answers

Answer:

The answer would be C

Step-by-step explanation:

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