7.6 More Rate Problems

Today we will review last night's homework problems.  As you can see the level of difficulty is ratcheting up but you are ready for it (even if you don't believe that yet).  I've listed how things are getting more challenging and the tools you have to meet the challenge:

• the problems require more translating from English into algebraic terms
1. use grids to break down the word problems
2. list information
3. rewrite tasks or questions
4. use the info and question to determine what answer you are seeking
5. label the answer with variables
6. go back and use the information to do the work and create linear equations that will help you solve for the variables

• the calculations are starting to involve more decimals or fractions. This is all the pre-algebra rational number work that can get tricky:
• with fractions you can multiply through BOTH sides of the equations to change fractions to whole numbers
• maintain your number sense while you do your fraction or decimal work 
• i.e. 1.9 X 1.2 approximates to 2 X 1 
• so when you get the answer of 228 you should know that you can place the decimal between the 2s
• the answer would be 2.28
• use a calculator to check your answers

After we are finished reviewing, you can start the next concept related to rates which focuses more on currents.  Please watch me solving the first part of the Rate w. Currents problem on the back of your classwork page.  Be sure you take notes and turn it in for full credit.

Then you can begin your homework:

HW: pg 415-17 #s 17, 21, 24