Pg. 244/245 Homework

• These are good review, but not required!!Pg. 244 #12, 13, 15, 3, 4, 9, 45 - 47

• #35 #36 Graph• #37 R = 6.52 ohms #38• #39 Graph #40 r = 3.84cm, h = 7.67cm• #41 #42 L ≤ 45• #43 P = 120, L = 30 #20 x = -1.94, x = 1.94• #22 (-1.71, 2.22) #24 x = -1.98; (0, ¾); y = x + 1 • #26 x = -0.93, x = 1.18; (0, -1); VA@ x = 1; y = x2 + 3x + 14• #10 x = 5 #12 (-∞, -6]U(-5, ∞)

2.3

2.3

xR x

x

18002P L L

L

2 7102S r r

r

Test Topics!!

Things to study!!• The quizzes!!• The HWs!!• Solving Rational Equations• Solving Rational Inequalities• Partial Fractions (A and B)• Sketching Rational Functions

– Required items?!?

• Word Problems!!!– Mixing Problems– Soda-can Problem– House Problem– Bike Problem– Rectangle Problems

• Be Smart!!– If is say “Solve” vs. if it says

“Solve using algebra”…

Test Review

• Solve:

• Solve using algebra:

• Solve:

• Sketch a complete graph:4 2

2

5 60

4

x x

x

2

4

30

1

x

x

3 70

2 3

x x

x

2 2

3

x xy

x

Test Review

Mixture• There is 30 ounces of a pure

substance. If you want to dilute it to have only a concentration of 35%, how much water must be added?

Soda Can• A cylindrical soda-pop can

has radius r and height h. A manufacturer wishes to find the dimensions of the can with the minimum surface area. Find an algebraic representation for the surface area as a function of the height if the height is twice the radius.