Hard Problem

[Sillysidley]

The sequence 1, x, 6, y is an arithmetic progression. Find x+y.

This is hard (high school or advanced middle school)
Mr. Hui told me to do this! As a hint lol

[~*~sebastian~*~]

i am not in high school or middle school yet so this is very hard for me.

[Sillysidley]

then don't do it, i'm in 6th grade and this was sort of hard for me...
don't worry, i'll post an easier problem next time

[Scion]

3.5+8.5=12

[Gassimus]

Since an arithmetic progression has a common difference, x is equal to (t3+t1)/2, so x = 3.5

Common difference (d)= t2-t1=2.5

so t4 (y) is tn-1 + d
=t3 + d
= 6 + 2.5
= 8.5

.:. the answer to (x + y) is (3.5 + 8.5) which is equal to 12.

[Mr. Hui]

Excellent explanation, Gassimus.

Off-topic: I also like you avatar.

[Gassimus]

haha, thanks:)

[patel3]

x + y

x = 1 and y = 6

so the answer is 7




( i hope i have it right)

[Sillysidley]

srry that is wrong


gassimus and redfire have it right


another way is that say the common difference=d

then x=6-d, and y=6+d

x+y

6-d+6+d=6+6=12

[Julia]

Mr. Stein (my math teacher),
What is your favorite game?
Julia L. HR.4

[jmw106462]

answer equals 12.

[jnep]

The sequence 1, x, 6, y is an arithmetic progression. Find x+y.

This is hard (high school or advanced middle school)
Mr. Hui told me to do this! As a hint lol

x+y =12

[kuhse245]

i am not in high school or middle school yet so this is very hard for me.

lol

[Profmat0]

The sequence 1, x, 6, y is an arithmetic progression. Find x+y.

This is hard (high school or advanced middle school)
Mr. Hui told me to do this! As a hint lol

The answer is 12

[jmw106462]

I think it's 12?

[shadow123blast]

1,x,6,y
This is a simple arithmetic progression
in order to calculate x we have the difference of the 1st and third term which is 5; so we divide that by 2 and then we add to 1 then we have 3.5
x=3.5
1+2.5=3.5
3.5+2.5=6
6+2.5=8.5
y=8.5
x+y=3.5+8.5=12

[Suresh]

The sequence 1, x, 6, y is an arithmetic progression. Find x+y.


x -1 = 6 - x
2x = 7
x= 3.5

and
y - 6 = 6 - x
y=12 - x
y = 12 - 3.5
y = 9.5

x + y = 3.5 + 9.5 =12

[jonathanfizz6]

what is this your homework?

[jmw106462]

I don't know?

[GreeneI]

The sequence 1, x, 6, y is an arithmetic progression. Find x+y.

This is hard (high school or advanced middle school)
Mr. Hui told me to do this! As a hint lol

The answer to (x + y) is (3.5 + 8.5) which is equal to 12.