\"\"

\

\"\"

\

\"\"

\

\"\"

\

\"\"

\

\"\"

\

\"\"

\

\"\"

\

\"\"

\

\"\"

\

\"\"

\

\"\"

\

1)  4x ^2< 10x -1

\

4x^2 -10x +1 < 0

\

\"\"

\

\"\"

\

\"\"

\

\"\"

\

\"\"

\

\"\"

\

\"\"

\

\"\"

\

\"\"

\

2) 10x - 4y + 3 < 11

\

10x -4y +3 - 11 < 0

\

First inequality 10x - 4y - 8 < 0

\

Second inequality y >= x^2 - 3x - 4

\

1. Draw the coordianate plane.

\

2.  Since inequality 10x - 4y - 8 < 0 symbol is < , the boundary is not included in the solution set. Graph the boundary of the inequality x + y = 8 with dotted line.

\

3.  To determine which half-plane to be shaded use a test point in either half-plane. A simple choice is (0, 0).

\

Substitute and x = 0 and y = 0 in original inequality 10x - 4y - 8 < 0.

\

-8 < 0

\

The statement is true.

\

4. Since the statement is true, shade the region contains point (0, 0).

\

Second inequality y >= x^2 - 3x - 4

\

2) Since inequality y >= x^2 - 3x - 4 symbol is >= , the boundary is included in the solution set. Graph the boundary of the inequality y >= x^2 - 3x - 4 with solid line.

\

A simple choice is (2, 3)

\

Substitute and x = 2 and y = 3 in original inequality y >= x^2 - 3x - 4

\

3 >= -12

\

The statement is true.

\

Since the statement is true, the graph will be shaded inside of parabola.

\

 

\

\