A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 5 years ago

The manager of a coffee shop has one type of coffee that sells for $5 per pound and another type that sells for $12 per pound. the manager wishes to mix 90 pounds of the $12 coffee to get a mixture that will sell for $10 per pound. How many pounds of the $5 coffee should be used?

  • This Question is Closed
  1. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Plz some one help me i have been trying to work this problem forever!!!

  2. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so call x the number of pounds of $5 coffee and y the number of pounds of $12 coffee you know that they want x + y = 90 and so you have to figure 5x + 12y = 900 why 900? because they want 90 lbs and for the mix to sell for $10 a pound

  3. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    the way to do this is by substitution or elimination we can do substitution. so use the first equation and we get y = 90 - x (by subtracting x from both sides) then using this lets substitute into the second to get 5x + 12(90 - x) = 900 then doing some algebra we get 5x + 1080 - 12x = 900 getting the variable on one side we get 180 = 7x solve for x we get 180/7 then back substitute into the first equation we get 180/7 + y = 90 and then you get y = 450/7

  4. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.