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TEACHER NOTES The warm up works on the distribution
property, but also use it to talk about un-distribution basically going backwards factoring out the GCF.
This will help in the Examples The examples are all from section 3.8 of the
Algebra 1 book and Homework is out of the Workbook
Slides 4, 7, and 12 are the worked out examples, and slide 16 is the challenge problem. May want to consider printing those out for their notebook. We quiz Thurs., if you are behind you may want to print all of it out to save time.
The challenge problem comes from p.189 #37
WARM UPUse the distributive property.1. -9( x + 2) 2. ½ (8x – 7)
REVERSE: Greatest Common Factor3. 4x - 12 4. 15x + 10
WORKED OUT EXAMPLE
Why is putting the equation in this form
advantageous for us when graphing?
Which means to solve for y with x represented on the other side of the = sign as part of a relationship between the y and the x.
a. Solve for w. (Volume of a rectangular
prism)
V = lwh
b. Solve for h. (Surface area of a prism)
S = 2B + Ph
PRACTICE!
𝑨𝒏𝒔𝒘𝒆𝒓 :𝒉=𝑺−𝟐𝑩
𝑷
The formula for the perimeter of a rectangle is:
EX.5 SOLVE THE FORMULA FOR W.
P = 2l + 2w
Use the formula to find the width of the rectangle shown below.
The distance d (in miles) traveled by a car is given by d = 55t where t is the time (in hours) the car has traveled. The distance d (in miles) traveled is also given by d = 20g where g is the number of gallons of gasoline used by the car. Write an equation that expresses g as a function of t.
CHALLENGE!