A merchant has coffee worth $20 a pound that she wishes to mix with 30 pounds of coffee with $60 a pound to get a mixture that i
s worth $30 a pound. How many pounds of the $20 coffee should be used?
1 answer:
Answer:
90 pounds
Step-by-step explanation:
Let x represent the number of pounds of $20 coffee in the mix. Then the cost of the mix is ...
20x + 60·30 = 30(30+x)
20x + 1800 = 900 +30x . . . . . eliminate parentheses
900 = 10x . . . . . . . . . . . . . . . . . subtract 900+20x
90 = x . . . . . . . . . . . . . . . . . . . . divide by 10
90 pounds of $20 coffee should be used.
You might be interested in
Answer:
2. 4 outcomes 3.12
Step-by-step explanation:
Answer:
Its the first one | -9 | < | 9 |
Step-by-step explanation:
its false because both sides are identical
Hope this helps!
You can add 9.5 plus 9.5 and get 19.
Answer:
they both have right angles
Answer:
_______
Step-by-step explanation:
i cant read that sorry :|