6.4 Day 2 ­ Applications of Systems.notebook
6.4 Day 2: Applications of Systems
February 09, 2016
Date: 2/9
Wind or Current Problems
1. Flying with the wind a plane went 156 mph. Flying into the same
wind the plane only went 110 mph. What is the speed of the wind?
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6.4 Day 2 ­ Applications of Systems.notebook
February 09, 2016
2. The speed of a kayaker is 5.75 mph paddling with the river current
and 3.25 mph padding against it. What is the speed of the river
current?
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6.4 Day 2 ­ Applications of Systems.notebook
February 09, 2016
3. You row upstream at a speed of 2 mph. You travel the same
distance downstream at a speed of 5 mph. What would be your
rowing speed in still water? What is the speed of the current?
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6.4 Day 2 ­ Applications of Systems.notebook
February 09, 2016
Percentage Problems
3. A metal alloy is a metal made by blending 2 or more types of metal.
A jeweler has supplies of two metal alloys. One alloy is 30% gold and
the other is 10% gold. How much of each alloy should the jeweler
combine to create 4 kg of an alloy containing 15% gold?
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6.4 Day 2 ­ Applications of Systems.notebook
February 09, 2016
4. You split $1500 between two savings accounts. Account A pays
annual 5% interest and Account B pays 4% annual interest. After one
year, you have earned a total of $69.50 in interest. How much money
did you invest in each account? Explain.
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6.4 Day 2 ­ Applications of Systems.notebook
February 09, 2016
Integer Problems
5. The sum of two numbers is 14. Their difference is 12. Find the
numbers.
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6.4 Day 2 ­ Applications of Systems.notebook
February 09, 2016
6. One number is 8 more than another. Their sum is 26. Find the two
numbers.
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6.4 Day 2 ­ Applications of Systems.notebook
February 09, 2016
Homework:
6.4 Practice Worksheet #2
no book tomorrow
Chapter 6 Test ­ next Wednesday
MathXL due next Wednesday
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