Annetta_Martin 2 years ago With a tail wind, a plane traveled 800 mi in 5 hours. With a head wind, the plane traveled the same distance in 8 hours. Which system of equations could be used to solve this problem? (s + w)5 = 800 and (s - w)8 = 800 (s - w)5 = 800 and (s + w )8 = 800 5s + 8w = 800 and 5s - 8w = 800

1. Peter14

which one do you think it is?

2. Annetta_Martin

The first one, I'm sure!

3. Annetta_Martin

Please tell me I'm right haha

4. Peter14

you are right :)

5. Peter14

any other problems?

6. Annetta_Martin

Yes I just have two more questions to finish my online study guide....

7. Annetta_Martin

8. Annetta_Martin

@bahrom7893 @ganeshie8 @mathstudent55 @AriPotta

9. ganeshie8

for the first 1, whats the coordinate where the blue and green lines intersect ?

10. Annetta_Martin

2, -1

11. ganeshie8

thats right !

12. Annetta_Martin

Yay! Ok :)

13. ganeshie8

second q : do u knw how coordinates of points of line y=x look like ?

14. ganeshie8

(0, 0), (1, 1), (2, 2), (3, 3), (4, 4), (5, 5),..... right ?

15. Annetta_Martin

Yes

16. ganeshie8

do u see any such point in the given line ?

17. ganeshie8

or easy way is to look at given options !

18. Annetta_Martin

4,4 right?

19. ganeshie8

right !, and u can confirm it in the graph also. if u see, the line is actually going thru (4,4)

20. Annetta_Martin

Thank you soo much! You're awesome for explaining everything :D

21. ganeshie8

np.. yw !