Tutors Answer Your Questions about Mixture Word Problems (FREE)
Question 328911: A chef is using a mixture of two brands of Italian dressing. The first brand contains 9% vinegar, and the second brand contains 14% vinegar. The chef wants to make 380 milliliters of a dressing that is 10% vinegar. How much of each brand should she use?
I have set up the equation as a system of linear equations, but am not sure if I did it correctly.
Click here to see answer by Fombitz(25151) 
Question 329353: By weight, an alloy of brass is 60% copper and 40% zinc. Another alloy of brass is 30% copper and 70% zinc. How many grams of each of these alloys must be melted and combined to obtain 300 grams of a brass with equal concentration of copper and zinc?
Click here to see answer by galactus(183) 
Question 330094: in high school auditorium the number of rows of seats is double the number of seats in each row. if there are the same number of seats in each row and 1352 seats in total, how many rows are there?
Click here to see answer by aseem(9) 
Question 330157: Two glasses are each filled halfway with soda. One with cola and the other with lemonlime. A small amount of the lemonlime is completely mixed into the cola. The glass is stirred so they are completely mixed. Then the same amount of the mixture is removed from the cola glass and put back into the glass with the lemonlime. After the exchange, is there more cola in the lemonlime glass or more lemonlime in the cola glass?
Click here to see answer by Fombitz(25151) 
Question 331275: A regular milk that is 10% fat mix with nonfat milk to obtain a lowfat milk that is 3%. How many pounds of regular milk and how many pound of nonfat milk should be mixed to obtain 80 pounds of lowfat milk?
Click here to see answer by ptaylor(2172) 
Question 331418: If Steven can mix 20 drinks in 5 minutes, Sue can mix 20 drinks in 10 minutes, and Jack can mix 20 drinks in 15 minutes, how much time will it take all 3 of them working together to mix the 20 drinks?
I started off by:
(x/5) + (x/10) + (x/15) = 1
Need a common denominator in order to add:
which is 30.
(6x/30) + (3x/30) + (2x/30) = 1
= (6x + 3x + 2x)/ 30
= 11x/ 30
= x = 30/11 = 2.72 which is 2 mintues and 7 seconds
However, the answer is not correct according to the solution. Am I missing a step? Or is the solution incorrect?
Click here to see answer by ankor@dixienet.com(18980) 
Question 332968: Retail Sales. Mountainside Fleece sold
40 neckwarmers. Solidcolor neckwarmers sold for
$9.90 each and print ones sold for $12.75 each. In all,
$421.65 was taken in for the neckwarmers. How many
of each type were sold?
Click here to see answer by josmiceli(13716) 
Question 333237: How do you calculate this question?
A student finishes the first half of an exam in 2/3 the time it takes him to finish the second half. If the entire exam takes him an hour, how many minutes does he spend on the first half of the exam?
Thank you.
Click here to see answer by solver91311(20879) 
Question 333323: A store mixes coffee A worth $10. per kilogram and coffee B worth $12. per kilogram. The mixture is to sell for $11. per kilogram. Find how much should be used to make a 480 kilogram mixture.
How many kilograms of coffee A should be in the mix?
How many kilograms of coffee B should be in the mix?
Click here to see answer by mananth(14512) 
Question 334016: 12 oz of mixed nuts was made by combining 4 oz of walnuts which cost $4/oz with 8 oz of peanuts which cost $10/oz. Find the cost per oz of the mixture.
The answer is $8/oz (I looked at the answer sheet! Shhh!), but I need to know how to solve it! And i have to show all of my work!
Help? Thank you so MUCH!!!
Click here to see answer by user_dude2008(1861) 
Question 334163: The price of milk increased from 40 cents per quart to 45 cents per quart. What is the % of increase?
A) 11.1%
B) .111%
C) 112.5%
D) 12.5%
E) .125%
I believe the correct answer is B. .111% Please confirm this is the right answer.
Click here to see answer by rfer(15570) 

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