Answer:
Step-by-step explanation:
The lowest point in New Orleans is 8 feet below sea level.
This can be represented numerically using
(negative sign denotes below sea level)
The highest point in Chicago is 735 feet above sea level.
This can be represented numerically using
(positive sign denotes above sea level)
Answer:
2 pounds of 1st kind and 8 pounds of 2nd kind are mixed.
Explanation:
Given:
Ten pounds of mixed birdseed sells for 8.24 per pound.
Price of the 1st variety of birdseed=5.68 per pound
Price of the 2nd variety of the birdseed=8.88 per pound.
To find :
Pounds of 1st variety of birdseed are used in the mixture=?
Pounds of 2ndvariety of birdseed are used in the mixture=?
Solution:
Let the weight of 1st kind added in mixture be n pounds.
Then weight of 2nd kind will be 10 – n pounds.
Now, total cost of mixture = cost of 1st kind birdseed + cost of 2nd kind birdseed
Weight of mixture x cost per pound = weight of 1st kind x cost per pound + weight of 2nd kind x cost per pound.
Substituting the values,
82.4 = 5.68n + 88.8 – 8.88n
8.88n – 5.68n = 88.8 – 82.4
3.2n = 6.4
n = 2
Then, weight of 2nd kind is 10 – 2 = 8 pounds.
Hence, 2 pounds of 1st kind and 8 pounds of 2nd kind are mixed.