anita has two sisters and three brothers. the mean of all their ages is 6 years. what will their mean age be 10 years from now?twenty years from now?

Answers

Answer 1

Answer: Answer:
Now: 6 yr mean age
in 10 yrs? 16 yr mean age
in 20 yrs? 26 yr mean age

Why? Because regardless of the relationship between each sibling's age, your always adding the 10yrs to each individual, which you are then dividing out to determine the mean age. See proof below:

Including anita, there are 6 people. We'll define each age as an unknown variable. Assume we know nothing about the relationships between their ages

for example sake
anita's age = a
sister 1's age = b
sister 2's age = c
brother 1's age = d
brother 2's age = e
brother 3's age = f

Now:
mean age = (a + b + c + d + e + f)/(6 people) = 6 yrs

in 10 yrs:
mean age = ((a+10) + (b+10) + (c+10) + (d+10) + (e+10) + (f+10))/(6 people)
mean age = (a + b + c + d + e + f + 60)/(6 people)
mean age = (a + b + c + d + e + f)/(6 people) + (60)/(6 people)
mean age = (a + b + c + d + e + f)/(6 people) + 10

Notice the first term is the same expression of the mean age for "Now"
Thus, in 10 yrs:
mean age = 6 + 10 = 16 yrs

The same principle applies for "x" yrs from now, as long as we know what the mean age is "Now"

Answer 2

Answer:

Answer:

10 years from now= 16

20 years = 26

Step-by-step explanation:

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A. How many sixths are in two-thirds?B. How many fourths are in six‑eighths?
C. How many halves are in 5/10?

Answers

a. 4

b. 3

c. 1

pick me for best answer plz!!

A4,b3,c1 is you answer

What is 3774 divided by 37

Answers

102 thts the anwser ur welcome

I was wondering if somebody could teach me Algebra easily. I am only in Elementary school but I can pick things up quickly. I am giving you ALL my thanks if you could do this for me!!

Answers

Algebra is just replacing numbers with symbols. Usually x and/or y. if x=3 then 5x=15. this is the basic idea of algebra is that you take real and imaginary numbers and make a symbol of it and find what he symbol mean.

algebra is numbers and variable's. You will learn a bit of it in 6th grade.you have to find x or do some other things.

https://www.youtube.com/watch?v=3vDoEVRS_7s

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Can someone please run the answer

Answers

1: =1/4; 0.3; 2/5; 0.65
2:=8 1/5; 8.44; 8.5; 8 4/5
3:=0.8888; 7/10; 3/5; 0.27
4:=8.04; 7 9/10; 7.85; 7 1/6
5:=5.8; 5 2/5; 4.33; 4 1/4
6:=1.2; 0.67; 5/8; 3/5
7:=9.3 and 9 1/4
8:= 8 1/3; 8.45; 8 9/10

YOUR WELCOME

Attached are pictures of the number lines for each problem. The easiest way to find fractions on a number line is to turn them into a decimal, which is done by dividing the top number by the bottom. For example, 3/5 would be 3 divided by 5.
Below are the numbers in order, least to greatest for #2, greatest to least for #3-6.

2. 8 1/5, 8.44, 8.5, 8 4/5
3. 0.888, 7/10, 3/5, 0.27
4. 8.04, 7 9/10, 7.85, 7 1/6
5. 5.8, 5 2/5, 4.33, 4 1/4
6. 1.2, 0.67, 5/8, 3/5

The graph shows a hot air balloon’s height above sea level, in feet, over time, in minutes.How much time did the hot air balloon spend ascending?
_____MIN.

Answers

20 you add the two ranges it moved using the times on the x axis

3. Find a solution to the following system of equations.
-3x + 3y = -9
-3x + y = 7

Answers

Answer:

x = 5

y = 2

Step-by-step explanation:

-3x + 3y = -9

3y = 3x - 9

Equation 1. y = x - 3

-3x + y = 7

Equation 2. y = 3x + 7

So, put number 1 equation to number 2's y :

x - 3 = 3x + 7

x -3x = 7 + 3

-2x = 10

2x = 10

x = 10/2

x = 5

And, put x, which is 5 , to the any equation to figure out the y.

This time, I'll use equation number 1.

y = 5 - 3

y = 2

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