Exercises 7–12: Determine whether the equation is linear or nonlinear by trying to write it in
the form ax + b = 0.
9. 2Va + 2 = 1
Exercises 38–40 will help you prepare for the material covered in
the first section of the next chapter.
In Exercises 38-39, simplify each algebraic expression.
38. (-9x³ + 7x? - 5x + 3) + (13x + 2r? – &x – 6)
39. (7x3 – 8x? + 9x – 6) – (2x – 6x? – 3x + 9)
40. The figures show the graphs of two functions.
y
y
201
10-
....
-20-
flx) = x³
glx) = -0.3x + 4x + 2
In Exercises 3–6, solve each system by graphing. Identify systems
with no solution and systems with infinitely many solutions, using
set notation to express their solution sets.
3. x + y = 5
3x - y = 3
4. [3x – 2y = 6
16x – 4y = 12
3
y
6. [y = -x + 4
|3x + 3y = -6
5.
5h
2х — у %3D — 4
Chapter 7 Solutions
College Algebra in Context with Integrated Review and Worksheets Plus MyLab Math with Pearson eText-- Access Card Package
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