One pound of swordfish costs as much as 1.5 pounds of salmon. mrs. o pays $39 for 2 pounds of salmon and 3 pounds of swordfish. find the ratio of the amount of money mrs. o pays for the swordfish to the amount of money she pays for the swordfish.

i know the answer is 9: 4, but how would you do this without algebra?

The ratio of the amount for swordfish to the amount of salmon is 6:4

Step-by-step explanation:

Given as :

The price for 1 pound of swordfish = The price of 1.5 pound of salmon

So, On this relation

The price for ( 1 × 2 ) pound of swordfish = The price of ( 1.5× 2 )  pound of salmon

i.e The price for 2 pound of swordfish = The price of 3 pound of salmon

Now According to question

Mrs. O pay the total money for 2 pounds of swordfish and 3 pound of salmon = $ 39

Let the money she pay for swordfish = 2 sw

And The money she pay for salmon = 3 sa

∵, The total money she pay for both  = $ 39

I.e  2 sw + 3 sa = 39

As 2 sw = 3 sa

So, 3 sa + 3 sa = 39

Or, 6 sa = 39

or, sa = =

∴ sw = ×

or, sw =

Now, the ratio of the amount for swordfish to the amount of salmon =

I.e The ratio =

Hence The ratio of the amount for swordfish to the amount of salmon is 6:4

Answer