Now that we have learned to graph nonlinear inequalities, we can learn how to graph systems of nonlinear inequalities. A
system of nonlinear inequalities is a system of two or more inequalities in two or more variables containing at least one inequality that is not linear. Graphing a system of nonlinear inequalities is similar to graphing a system of linear inequalities. The difference is that our graph may result in more shaded regions that represent a solution than we find in a system of linear inequalities. The solution to a nonlinear system of inequalities is the region of the graph where the shaded regions of the graph of each inequality overlap, or where the regions intersect, called the
feasible region .
Given a system of nonlinear inequalities, sketch a graph.
Find the intersection points by solving the corresponding system of nonlinear equations.
Graph the nonlinear equations.
Find the shaded regions of each inequality.
Identify the feasible region as the intersection of the shaded regions of each inequality or the set of points common to each inequality.
These two equations are clearly parabolas. We can find the points of intersection by the elimination process: Add both equations and the variable
$\text{\hspace{0.17em}}y\text{\hspace{0.17em}}$ will be eliminated. Then we solve for
$\text{\hspace{0.17em}}x.$
The two points of intersection are
$\text{\hspace{0.17em}}\left(2,4\right)\text{\hspace{0.17em}}$ and
$\text{\hspace{0.17em}}\left(\mathrm{-2},4\right).\text{\hspace{0.17em}}$ Notice that the equations can be rewritten as follows.
Graph each inequality. See
[link] . The feasible region is the region between the two equations bounded by
$\text{\hspace{0.17em}}2{x}^{2}+y\le 12\text{\hspace{0.17em}}$ on the top and
$\text{\hspace{0.17em}}{x}^{2}-y\le 0\text{\hspace{0.17em}}$ on the bottom.
There are three possible types of solutions to a system of equations representing a line and a parabola: (1) no solution, the line does not intersect the parabola; (2) one solution, the line is tangent to the parabola; and (3) two solutions, the line intersects the parabola in two points. See
[link] .
There are three possible types of solutions to a system of equations representing a circle and a line: (1) no solution, the line does not intersect the circle; (2) one solution, the line is tangent to the parabola; (3) two solutions, the line intersects the circle in two points. See
[link] .
There are five possible types of solutions to the system of nonlinear equations representing an ellipse and a circle:
(1) no solution, the circle and the ellipse do not intersect; (2) one solution, the circle and the ellipse are tangent to each other; (3) two solutions, the circle and the ellipse intersect in two points; (4) three solutions, the circle and ellipse intersect in three places; (5) four solutions, the circle and the ellipse intersect in four points. See
[link] .
An inequality is graphed in much the same way as an equation, except for>or<, we draw a dashed line and shade the region containing the solution set. See
[link] .
Inequalities are solved the same way as equalities, but solutions to systems of inequalities must satisfy both inequalities. See
[link] .
hi can you give another equation I'd like to solve it
Daniel
what is the value of x in 4x-2+3
Olaiya
if 4x-2+3 = 0
then
4x = 2-3
4x = -1
x = -(1÷4) is the answer.
Jacob
4x-2+3
4x=-3+2
4×=-1
4×/4=-1/4
LUTHO
then x=-1/4
LUTHO
4x-2+3
4x=-3+2
4x=-1
4x÷4=-1÷4
x=-1÷4
LUTHO
A research student is working with a culture of bacteria that doubles in size every twenty minutes. The initial population count was 1350 bacteria. Rounding to five significant digits, write an exponential equation representing this situation. To the nearest whole number, what is the population size after 3 hours?
A guy wire for a suspension bridge runs from the ground diagonally to the top of the closest pylon to make a triangle. We can use the Pythagorean Theorem to find the length of guy wire needed. The square of the distance between the wire on the ground and the pylon on the ground is 90,000 feet. The square of the height of the pylon is 160,000 feet. So, the length of the guy wire can be found by evaluating √(90000+160000). What is the length of the guy wire?