## ihatealgebrasomuch 2 years ago can someone please explain to me how to use ratios? i completely forgot and need to know them for a test tomorrow! heres the question- The ratio of 2 consecutive sides of a parallelogram is 7:9. If the perimeter is 224cm, what is the length of the sides?

1. ihatealgebrasomuch

can you explain in a bit more detail? @cherio12

2. cherio12

a ratio is one thing divided by another. Sorry, i guess drawing the picture like that isn't the best idea to get the point across..1 second

3. cherio12

for every 7 units on the one side you have 9 units on the other

4. cherio12

wait...idk if i like that picture either..>.<

5. cherio12

|dw:1355358572569:dw| try three...

6. ihatealgebrasomuch

okay so i would set 18x +7x equal to 224, and solve for x?

7. cherio12

18x+14x you have two sides of both

8. ihatealgebrasomuch

oh yeah, i mean 14, forgot to add that one ;P

9. ihatealgebrasomuch

i got the right answer! thank you so much!!! XXX

10. cherio12

no problem