1. Warm-up 1) Solve the system using substitution:
3y - 2x = 11
 y + 2x = 9
2) Given the inequality
and the graph, shade
appropriately.

3. Application Problem
The amount of money that a freshman class fundraiser can raise can be modeled by the inequality y≤-2x2 + 16x – 24, where x represents the number of days into the sale and y represents the amount of money raised in hundreds.
a) Graph
b) What is the max?
What does it represent?
c) When will they start
to raise money
d) How many days should
the fundraiser last?
e) On which days will the sale make more than $400?

5. Solving Nonlinear Systems

6. If the graphs of a system of equations are a conic section and a straight line, the system will have zero, one, or two solutions.
Examples
no solution 1 solution solutions

7. You will use these same techniques to solve quadratic systems.
We’ve already studied techniques for solving systems of linear equations.
You will use these same techniques to solve quadratic systems.
These techniques are ???
Substitution, Elimination, Graphing

8. Find the points of intersection
y = x2 +2x+4 & y = 6x + 1
We will use….. Substitution.
Now plug these values into the
Equation to get y!!
(3,19) and (1,7) are the points
where the two graphs intersect.
Check it on your calculator!

9. Solve by substitution or Elimination:

13. A rocket is launched from the ground and follows a parabolic path represented by the equation y = -x2 + 10x. At the same time, a flare is launched from a height of 10 feet and follows a straight path represented by the equation y = -x When and at what height does the flare and the rocket meet?

14. A pelican flying in the air over water drops a crab from a height of 30 feet. The distance the crab is from the water as if falls can be represented by the function h(t) = -16t2 + 30, where t is time, in seconds. To catch the crab as it falls, a gull flies along a path represented by the function g(t) = -8t Can the gull catch the crab before it hits the water? Justify your answer.

15. Calling All Superheroes
This will be your first project. It will be due September 17th at the beginning of class. It will involve not only math but writing and some creativity. Do NOT wait until 16th to try to start and finish this assignment. It will be a quiz grade that will not be replaced by a test.