2 math questions help please?

[Anonymous]

1. Suppose you work for a large coffee distributor that has a secret coffee blend it sells to local stores. You mix the Gualtemala Antigua blend with the Organic Free Trade blend, but always in the same proportion. Yesterday, you mixed 90 pounds of the Gualtemala Antigua blend with 36 pounds of the Organic Free Trade blend. Today, there is 40 pounds of the Gualtemala Antigua coffee left in stock. How many pounds of the Organic Free Trade coffee should you mix with it to get your secret blend?

2. As a nurse, part of your daily duties is to mix medications in the proper proportions for your patients. For one of your regular patients, you always mix Medication A with Medication B in the same proportion. Last week, your patient's doctor indicated that you should mix 90 milligrams of Medication A with 54 milligrams of Medication B. However this week, the doctor said to only use 42 milligrams of Medication B. How many milligrams of Medication A should be mixed this week?

[Luvme66]

1.
The ratios are equal... so..

90/36=10/6

So the next day it would be

40/x=10/4
=> 40 (4)=10 (x)
=> 160=10x
=> x=16
-----''----''-'-'-------------------------
2.
It is same as the first one..

You just have to use tge valuse to find the ratios and then again equate it to the ratios of the known and other unknown value!

[Tractorbeam]

1./
40/90 x 36 = 16 lbs of Organic free Trade.
2./
42/54 x 90 = 70 mg of Medication A.

[Anpu23]

#1 16 LBS of Organic Free Trade coffee (ratio is 2.5 to 1)

#2 70 Mg or Medication A (ratio 1 2/3 to 1)

[kheserthorpe]

What do you know, where are you stuck?

[Asker]

im just confused since its due Monday and the teacher never went over this with us. lol

[kheserthorpe]

How comfortable are you with ratios?